(late reply, whoops)
There isn't a console command. You can try messing with the row in Nexerelin/data/campaign/rules.csv that creates the bar event (nex_remM1_begin), but most of the requirements for mission spawning are set in code.
(The code requirements are: The mission spawn location needs to be Prism Freeport if it exists, or any independent market otherwise; another independent market other than the spawn location must also exist, not be 'hidden' like popup pirate bases, and not be in hyperspace)
No worries!
Glad to learn bit by bit as all I know is a bit of tweaking of ship stats aside from world settings. Also surprised to learn that one of the triggers is the amount of days passed (At least it lowers the odds of the issue being a mod conflict considering that I have... 109 active mods ; v ; ).
EDIT: Yeah I've tested the DaysSinceStart stat and yeah Midnight still works.