There’s a dynamic going on with your mother, where you are “socially clueless” according to her. There’s some disconnect there.

Take WishfulThinker’s comment, for example: We all start picking up and learning these social cues from birth. Over time, our understanding develops, making us able to model the behavior we’ve seen. What went ‘wrong’ with that learning?

Many people who are ‘on spectrum’ describe the kind of social awkwardness and disconnect you are describing. I’m not suggesting anything, but just thought I’d touch on that.