I downloaded the ICpos.dat file from vizier and there are 6490 objects listed. Many with duplicate numbers , which are probably star clusters.
I also scanned an early '23 copy of the spansh db looking for IC nnn SECTOR xxx... like names and found 370955 of them.
So I don't know what FD did with them, but there are far more IC stars in FD than there are in the actual IC catalogue.
Most of them have what look like proc gen names with a sector number, here are the first systems in each sector..
IC 348 Sector EL-Y c0,-382.84375,-382.0625,-1143.21875,1
IC 410 Sector AV-Y d0,-1205.84375,-248.375,-11016.84375,1
IC 1287 Sector AA-P a6-0,-343.6875,-44.3125,897.15625,1
IC 1396 Sector AA-A b17-0,-2380.71875,277.90625,-580.65625,0
IC 1590 Sector AA-P d6-0,-7573.375,-1053.5,-5222.84375,1
IC 1805 Sector AA-A a30-0,-4252.28125,-33.09375,-4363.78125,1
IC 1848 Sector AA-A b29-2,-4605.84375,44.34375,-4518.03125,1
IC 2391 Sector AA-A d27,493.34375,-117.15625,-34.09375,1
IC 2395 Sector AA-Y b1-0,2346.8125,-122.875,-213.3125,0
IC 2621 Sector AA-Z c0,14415.40625,-1261.875,5620.59375,1
IC 4191 Sector AV-Y c0,11780.09375,-1184.09375,8059.46875,1
IC 4604 Sector AA-Q b5-0,116.53125,139.1875,593.84375,1
IC 4634 Sector BQ-Y d2,-72.6875,1578.28125,7312.03125,1
IC 4651 Sector AA-A e2,894.9375,-388.46875,2705.9375,1
IC 4663 Sector AA-Z c1,1578.90625,-902.6875,6178.34375,1
IC 4665 Sector AA-F b12-0,-402.9375,300.1875,959.8125,0
IC 4756 Sector AA-G b11-0,-792.03125,88.75,1329.15625,]
IC 4996 Sector AA-A e9,-5540.78125,119.8125,1427.84375,0
IC 4997 Sector AA-Z c0,-6622.21875,-1500.96875,4059.125,1
IC 5117 Sector AA-Z c8,-2931.46875,-217.46875,-26.96875,1
IC 5146 Sector AA-A f2,-2748.1875,-251.09375,-213.09375,1
IC 5217 Sector AA-A e0,-9254.5,-923.1875,-1722.5,1
And then there are these stars, which do not have sector names and do not have proc gen names....
IC 1805 HG 167,-4366.78125,115.65625,-4320.53125,1
IC 2391 CTIO 62,609.5625,-73.5,-0.34375,1
IC 2391 D 112,591.03125,-68.3125,2.5,1
IC 2391 D 41,552.0625,-73.625,6.8125,1
IC 2391 D 97,578.84375,-69.21875,3.96875,1
IC 2391 PMM 1373,555.875,-66.625,12.09375,1
IC 2391 PMM 2012,554.0,-65.625,10.625,1
IC 2391 PMM 3359,578.21875,-74.46875,1.21875,1
IC 2391 PMM 5376,592.40625,-73.90625,-1.625,1
IC 2391 PMM 756,608.15625,-75.5,13.59375,1
IC 2391 PP 9,598.03125,-68.4375,7.59375,1
IC 2391 RB 955,642.53125,-75.65625,4.375,1
IC 2391 SMY 18,560.0,-66.9375,2.5625,1
IC 2391 SMY 23,594.25,-74.71875,8.96875,1
IC 4651 241,1016.53125,-414.46875,2820.90625,1
IC 4651 AMC 3220,1002.1875,-413.09375,2766.15625,1
IC 4651 BT 1,1045.0,-411.9375,2862.46875,0
IC 4651 EGG 18,991.90625,-405.59375,2731.28125,1
IC 4651 EGG 48,1019.3125,-418.84375,2818.1875,1
IC 4651 EGG 56,1037.6875,-423.84375,2864.46875,1
IC 4651 EGG 94,985.15625,-403.5625,2727.5625,1
IC 4651 MEI 10538,985.6875,-402.84375,2728.5625,1
IC 4651 MEI 13145,981.375,-405.21875,2700.78125,0
IC 4651 MEI 13477,986.71875,-407.28125,2720.03125,1
IC 4651 MEI 6153,1029.71875,-416.09375,2852.375,]
IC 4651 MMU 11218,991.65625,-408.09375,2723.46875,0
IC 4651 MMU 12935,1030.625,-424.6875,2843.28125,1
IC 4651 MMU 14527,979.90625,-404.53125,2713.21875,1
IC 4651 MMU 17646,1024.78125,-428.53125,2849.125,1
IC 4651 MMU 9025,1029.125,-420.0625,2838.0625,1
IC 4665 MRD 108,-567.34375,339.25,956.875,1
IC 4665 MRD 115,-581.25,346.96875,979.90625,0
IC 4665 MRD 117,-533.28125,318.28125,899.40625,0
IC 4665 MRD 118,-624.15625,372.4375,1059.6875,0
IC 4665 MRD 123,-542.75,323.59375,912.5625,1
IC 4665 MRD 134,-531.90625,316.09375,894.9375,0
IC 4665 MRD 23,-568.375,349.09375,950.25,1
IC 4665 MRD 24,-604.59375,371.1875,1019.40625,0
IC 4665 MRD 3,-573.625,355.03125,964.46875,1
IC 4665 MRD 32,-621.1875,380.5,1042.71875,0
IC 4665 MRD 34,-517.5,316.625,876.5,0
IC 4665 MRD 35,-573.28125,350.65625,968.71875,0
IC 4665 MRD 36,-512.625,313.53125,867.125,0
IC 4665 MRD 4,-566.1875,350.40625,955.96875,1
IC 4665 MRD 57,-627.1875,379.96875,1056.4375,0
IC 4665 MRD 64,-524.8125,316.96875,893.96875,0
IC 4665 MRD 8,-598.125,369.28125,1014.1875,1
IC 4665 P 107,-540.65625,325.5,927.6875,0
IC 4665 P 139,-593.53125,351.8125,1006.125,0
IC 4665 P 151,-582.84375,343.78125,981.3125,0
IC 4665 P 165,-587.5,343.65625,981.0,0
IC 4665 P 173,-539.1875,335.75,916.375,0
IC 4665 P 187,-564.46875,349.0625,970.8125,0
IC 4665 P 198,-527.28125,325.4375,895.53125,1
IC 4665 P 2,-597.9375,370.875,1018.59375,0
IC 4665 P 20,-620.5625,378.59375,1055.96875,0
IC 4665 P 200,-583.46875,359.90625,999.46875,0
IC 4665 P 205,-547.4375,337.34375,937.6875,0
IC 4665 P 209,-594.375,365.96875,1017.59375,0
IC 4665 P 217,-591.71875,363.90625,996.8125,0
IC 4665 P 218,-621.0,381.84375,1061.8125,1
IC 4665 P 224,-519.25,319.0625,891.625,1
IC 4665 P 231,-482.96875,296.25,824.0,1
IC 4665 P 235,-534.71875,327.84375,912.15625,0
IC 4665 P 240,-611.625,374.375,1028.71875,0
IC 4665 P 244,-570.21875,348.5625,968.84375,0
IC 4665 P 246,-503.96875,307.96875,856.0,1
IC 4665 P 248,-555.4375,339.28125,949.3125,0
IC 4665 P 259,-581.25,354.4375,996.6875,0
IC 4665 P 261,-508.25,309.6875,865.03125,1
IC 4665 P 264,-553.5625,337.0625,941.5,0
IC 4665 P 265,-613.15625,373.28125,1037.9375,0
IC 4665 P 274,-514.90625,312.34375,869.84375,0
IC 4665 P 30,-542.875,328.5625,910.71875,1
IC 4665 P 305,-615.15625,371.0625,1052.09375,0
IC 4665 P 320,-561.0,337.5,955.15625,0
IC 4665 P 342,-575.875,345.09375,980.09375,0
IC 4665 P 351,-551.15625,329.90625,922.375,1
IC 4665 P 378,-527.34375,314.09375,894.6875,0
IC 4665 P 392,-495.65625,294.375,839.03125,0
IC 4665 P 404,-576.0,340.59375,973.125,0
IC 4665 P 406,-494.09375,291.9375,834.75,0
IC 4665 P 411,-571.3125,337.53125,961.1875,0
IC 4665 P 413,-498.34375,294.09375,841.1875,1
IC 4665 P 77,-548.46875,335.71875,941.3125,0
IC 4665 P 94,-628.0625,381.625,1067.46875,0
IC 4756 ALC 71,-1000.15625,163.90625,1354.875,1
IC 4756 ALC 85,-980.8125,160.28125,1342.09375,1
IC 4756 ALC 89,-985.59375,153.1875,1346.90625,1
IC 4756 ALC 90,-890.4375,143.15625,1212.3125,1
IC 4756 ALC 93,-946.6875,151.1875,1294.6875,1
IC 4756 HER 243,-913.71875,141.5625,1245.25,1
IC 4756 HER 247,-948.59375,148.46875,1284.875,1
IC 4996 4,-5546.71875,137.375,1454.90625,0
IC 4996 DAM 9,-5611.15625,129.875,1462.28125,1
IC 4996 PUR 45,-5360.40625,124.625,1405.53125,0
IC 4996 PUR D,-5517.0,131.5625,1438.71875,1
IC 4996 VBP 26,-5564.9375,130.53125,1457.125,1
IC 4996 VBP 83,-5376.46875,125.6875,1403.34375,1
IC 5146 11,-2999.9375,-287.4375,-224.4375,1
IC 5146 12,-2624.625,-251.6875,-196.90625,1
IC 5146 13,-2641.5625,-251.90625,-199.4375,1
IC 5146 14,-2523.40625,-241.09375,-190.15625,1
IC 5146 15,-2666.25,-256.0,-200.71875,1
IC 5146 19,-2778.34375,-265.375,-211.84375,1
IC 5146 2,-2856.28125,-271.84375,-212.21875,1
IC 5146 20,-2880.5625,-276.0625,-218.84375,1
IC 5146 21,-2861.71875,-273.4375,-218.21875,1
IC 5146 22,-2573.75,-248.25,-194.875,1
IC 5146 23,-2693.875,-259.09375,-204.65625,1
IC 5146 24,-3042.25,-290.53125,-233.78125,1
IC 5146 28,-2541.90625,-243.9375,-194.78125,1
IC 5146 31,-2973.5,-287.90625,-226.84375,1
IC 5146 32,-2985.46875,-287.34375,-229.4375,1
IC 5146 35,-2496.09375,-242.0625,-190.53125,1
IC 5146 37,-2933.8125,-281.90625,-226.34375,1
IC 5146 40,-2638.03125,-253.96875,-203.375,1
IC 5146 41,-2812.625,-272.90625,-215.21875,1
IC 5146 44,-2786.8125,-270.15625,-213.53125,1
IC 5146 50,-2489.0625,-240.3125,-192.21875,1
IC 5146 53,-2565.40625,-249.625,-196.75,1
IC 5146 55,-2497.0,-239.96875,-194.4375,1
IC 5146 56,-2811.53125,-271.8125,-217.71875,1
IC 5146 58,-2818.46875,-271.5625,-219.375,1
IC 5146 60,-2689.40625,-260.40625,-208.375,1
IC 5146 62,-3024.78125,-294.03125,-233.78125,1
IC 5146 63,-2997.0,-290.8125,-232.0625,1
IC 5146 64,-2805.46875,-272.1875,-217.46875,1
IC 5146 69,-2518.65625,-243.46875,-196.4375,1
IC 5146 7,-2548.46875,-242.21875,-190.5,1
IC 5146 70,-2675.375,-261.0625,-206.6875,1
IC 5146 8,-3061.5625,-293.125,-228.375,1
IC 5146 9,-2577.125,-245.625,-193.40625,1
Of the IC non-proc gen names above, every single one of them is in the Spansh db, so have been visited.