>>379539707
Simple props don't need to be weight painted. since they're usually objects you're slapping on existing bones. Weight painting is the action of mapping parts of the mesh itself to the bones using Vertex groups. It's a pretty complex topic so to get your head around it, so first try and figure out weight transfer after sculpting an outfit on if it's original.
https://www.youtube.com/watch?v=yEAvSDrS_n0
In Blender, you can still set up toggles if it's separate meshes.

If it's an outfit made for your model, you can get things like autodresser to just put it on.