tl;dr: watch the cute grandma already, just search for 鬼灯わらべ Hoozuki Warabe, reps definitely required, optional if you're fine with a cackling cutie.

Question for all the experts:
Did Tamaki specify why they're not playing with Hololive that much anymore? Sure she got her own box to manage now but none of the holos would outright reject a collab and they certainly know each other as well as some of the newer talents, it would also boost their numbers. Maybe they don't want the EOPs what do I know.