Yes - like a lot of people have said, DID/DDNOS is a spectrum, it's good that you already know that. A lot of the practitioners still don't know enough about it.
I too have always felt like a child in an adult suit, and i often am unaware of my actual body age - to the point where I get it wrong when asked lol. There's a lot of good info in here already, so I won't repeat stuff