Star Trek: Picard season 3, episode 4, "No Win Scenario," depicted the USS Titan-A's holodeck functioning when the rest of the starship was without power, but the reason why is consistent with canon established in Star Trek: Voyager. Before Admiral Jean-Luc Picard (Patrick Stewart), Dr. Beverly Crusher (Gates McFadden), and Jack Crusher (Ed Speleers) masterminded the Titan's escape from the Ryton Nebula's gravity well, Picard, Jack, and members of the crew took refuge in the holodeck, which recreated Guinan's (Whoopi Goldberg) 10 Forward bar in Los Angeles.
On Twitter, Dave Blass, Star Trek: Picard season 3's production designer, posted a video compilation of Star Trek: Voyager episodes explaining how the Titan's holodeck had power when the rest of the ship didn't. Check out the Tweet below:
Star Trek: Picard season 3 showrunner Terry Matalas retweeted Blass' Tweet, which addressed fan complaints they'd received since episode 4 premiered on Paramount+. Of course, even with the explanation provided, some fans still took umbrage in their Twitter replies.
