How do I reach a level of equal footing in conversation?

I’ve noticed recently that others seem to treat me almost like a kid or something. It’s not that I think they baby talk me or anything, but I think I must come across like I’m inexperienced or to some extent less knowledgeable about whatever topic it is. I think it’s started to feed into my impostor syndrome. I notice that people feel the need to rearticulate things I say to others, or will explain things to me that I’m fully aware of. I will acknowledge that within my field there’s still a lot of catching up I’m doing as far as some of the more in depth topics, but I think the fact that I don’t have that means that others assume that I also don’t know some more basic things. How do I get to a point where I don’t feel this assumed ineptitude from others?