I think there are mods, but not sanctioned ones unfortunately. Here’s the last thread I saw raising the same issues just as an FYI and in case it has some useful info in it for you:
https://forums.fatsharkgames.com/t/the-accessibility-issues-in-vermintide
I really really wish this game did better with accessibility options. It’s a crying shame but I’ve never seen FS indicate this is even so much as on the backburner.