Avatar armature won't effect mesh only in unity

Recently, while setting up any avatar in unity and I get to what I have to do in the rig tab for my model, I notice that the armature moves, but not the mesh. It is perfect in blender and everything is set up exactly how it was for every other avatar I have made. I can not find a way to fix this. The weight painting and parenting is perfect in blender and the assigned bones in unity are perfect.
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Just to iterate, these two models are posable in blender, but not in unity.
This has plagued me for a few months and I can’t find any information on this online.