Enough time has passed that the 1st episode from season 4 of Strange New Worlds is now open for memery goodness. Episode 2 “The Griffin Incident” on the 30th, just in time for Hallow Hemmer-ween!
TNG s6e16 “Starship Mine” aka “Star Trek Does a Die Hard” and SNW s4e1 “Valles Marineris”
Edit: Season 6 of TNG, not 7
except romulans still need to feed the black hole with some kind of material, so its not a true blackhole that can be used to generate power indefinitely, like in stargate. apparently thier power source is less efficient than federation warp cores.