So I searched that nebula and found no new signs of biological life. Decided to get back to my travels onwards to Beagle Point. However after a few jumps I saw this small 10-15 planet red nebula GREEROI AA-A H3 and thought no. A few more jumps and its still there, calling me, then I seemed to remember a setting that would tell me if anyone had visited the stars. So I found it in the Galaxy Map settings and sure enough to my absolute surprise no one had been there!!!
So a quick 3kly detour. After a few jumps I double checked that I had read the settings and yes I had it set correctly and no, no one had been there, or indeed on the route I was traveling. So to triple check I stopped and scanned a system and sure enough I was the discoverer - onwards and quite excited.
Short lived - On arriving at the nebula I was greeted by burger vans, t-shirt sellers, even Uber had an outpost there! So I re-checked my settings and sure enough the Galaxy map states its unvisited, but its completely scanned and mapped. Its a shame really that the mechanic does not work, but I guess it also adds an extra element of discovery.
Anyway made the most of my visit
This is me flying really high in my SRV, its a low G planet with Water Geysers, I drove over a really high pressure Geyeser and was tumbled and pushed high up the air. At first I was worried I was not going to come back down but slowly the decent started and because it was low G I was easily able to halt my decent with the thrusters so no punishing hard landing. This picture was from the third or fourth I tried

Does not really look too high, but it was.
I have been looking for Biological life, its a pain that planet based life takes so long to get scanned. Up until very recently I had not realised that Biological life and Volcanic activity where so closely linked and I had long ago stopped waiting for the "scanning" element of the planet detection FSS to finish and was simply just looking at the planet details on the System Map which will show volcanism but to my (limited) knowledge won't show Biological life.
However now pre-armed I tried and still failed to find anything new - undiscovered. But I do know there are other Biological life types such as Notable Stellar Phenomena. That said I have been from Sol - SagA - Sol - Sag A - Highest point I can reach above Sag A - Sag A and now I am over half way to Beagle Point and yet I believe I have only ever found one instance of a Notable Stellar Phenomena - Is there a trick I am missing?
Just yesterday I got all excited as I entered a system and there was a sound of insect life - Cricket's chirping. I had heard this sound once or twice before but never had the knowledge to really search a system. So I scanned everything and mapped all landable planets but nothing! I then did a small circular search of the local systems to this system and nothing, then when I arrived back in this system all was quiet - nothing.
Does anyone know if that sound means life and if so how to search for it?
Anyway I am now back to traveling, no more stopping at Nebula until after I reach Beagle Point and I am only FSS scanning Class A and B stars as these seem to be the most common supporting planet based life. Any other star type just gets honked and a quick glance to see if there are any Notable Stellar Phenomena.