Curate, connect, and discover
i wouldnt say ultra impact provides anything of major substance to any of bnha, and of course you run into any issue of arguing its canonicity.
but i do feel very strongly that it is very good at portraying the characters, like the writers get the essence of a character even if nothing of bombast is being done with them.
yes this is entirely because i am consistently happy with what materials the game provides for 1B, we got a 1B monoma-centric event which understands both that he is a competitive little prick who really would like to stick it to 1A, while also being intensely aware (in a very humble way) that he is NOT better at utilizing the quirks of his classmates after pulling off a fairly complicated strategy
Of course, he immediately undercuts himself by going back to his, "and with this we will be better than 1-A" schtick, but that too is part of his character.