I havn't seen one yet, but feel free to post about that here if you'd like. This place is for anything even tangentially related to DnD
And we need a 3dprintedtabletop community too!
Hey, I recently opened tabletop.place as a go-to non-generalized instance for communities dedicated to stuff like that. There is currently a 3D printed minis community there that may begin to be what you're looking for.
I've just created one called tabletopminis https://lemmy.world/c/tabletopminis
See you there!