Since dye depot has been updated to 1.21.1, it makes sense to also ask for a ported version of this mod.
Right now this will not yet happen, since almost all the mods I added compatibility for, are not yet on 1.21.1 themselves, which would mean I'd have to delete most of the current code, just to re-add it later.

I will keep you updated about the status of a 1.21.1 version here