Admittedly I'm not super in-the-know with the Nijisanji crew but what was the speed-debuts from her and her gen-mates?
They came from the same audition as Lazulight. And Nijisanji already has an established tradition of debuting their streamers in smaller groups but more frequently.
I would not be surprised if there are others who already passed the auditions and are in the waiting for debut 2-3 months later, however long it takes to get the whole group and their original song prepared.