Maybe it’s possible to use one of those mooer cab-sim mini-pedals?, they have a gain controller…
But I wouldn’t really know if this works in the desired way or messes up the sound of your voice too much.
They doesn’t cost the world though, so maybe worth experimenting?
Maybe the Old Blood Noise Endeavors MAW is worth considering. Some nice utility, couple of FX and a lot of gain, a lot!