This is normal for this stage of a UA-bombing. The MA demand will only appear once the station is actually disabled. (EDIT: which isn't going to happen this time, of course)
High-Tech and Military stations have a baseline demand for Meta-Alloys which is unrelated to UA activity, but the Dove Enigma is Industrial/Extraction, so doesn't.
It will be interesting to see the traffic report when it comes out.
24-hour traffic is up by about 80-100 ships on the weekday average for the system. (If you assume all of those extras were fairly large ships mostly full of meta-alloys, that's as Galnet says easily enough to fix the station)
Multiple station services are unavailable at Jacques due to a very recently implemented lockdown. I'm told this is due to civil unrest caused by CMDRs attacking security forces. I haven't checked the other orbital and planetary base in system for their status, but I can do that later.
Is the Dove Enigma megaship susceptible to this kind of BGS attack?
Lockdown has multiple possible causes - attacks on security forces are certainly a possibility, but they're also pretty normal for factions coming out of a War state to have, and Jaques does get into quite a few wars. I can't remember how long this Lockdown has been pending - I think it's been a while, though.
The Dove Enigma megaship (and the Colonia Orbital and Colonia Hub stations) are under the jurisdiction of Colonia Council rather than Jaques, so are not affected by the present Lockdown.
Colonia Council can have Lockdowns, but due to its unusual BGS position is in practice mostly immune to them (it has been in Lockdown for only 3 days out of the last 320). Jaques is similarly mostly-immune.
(Incidentally, while Lockdown gets a bad reputation for its effect on commodity markets, it's not a wholly negative state - one result of the lockdown of Jaques has been an increase in system security, so Colonia has been Medium rather than Low security while the meta alloys were delivered. In Beyond, with more things keyed to security level, there may be more circumstances where causing a Lockdown has benefits - opening up material brokers, or closing down interstellar factors)