While I get that this might not appeal to those who aren’t fans of hololive talent, it is well worth checking out for the low asking price of free.
Idol Showdown from Besto Games is a completely free hololive fan game that happens to be a super fun fighting game as well. It lets you play as hololive vtubers with easy controls, robust online play, and a lot of care and love for the source material. While I get that this might not appeal to those who aren’t fans of hololive talent, it is well worth checking out for the low asking price of free. If you do happen to be a fan of hololive, this should already be on your Steam Deck. It has a shocking amount of content for a free fan game as well.