Will they update FNaF 2 since the withered update for blacklight/100%?

You are not required to beat Withered mode I don't think. Considering you can unlock Pizza Party without beating it, it appears you most likely don't have to beat it here either. I think its just an extra thing they added to the game for fun.

I don’t know if it was a later update, but you are required to beat Withered before you get access to Pizza Party. Is it possible to have a separate category for this? It adds like an extra 5 mins :/

I'm seeing the same problem, I would like to compete with the higher spots but withered Mode is an extra five minutes, even If I perfect everything before it's still menus and the game itself to get past