Autism is a developmental disability, might also see it under social communication disability, really it should be in a category of its own. Or if they want to combine, maybe autism/ adhd.
Dyslexia, dyspraxia, and dyscalculia are Specific Learning Difficulties, or SpLDs. Dyspraxia can also be classed as a physical disability, but this aspect of it is usually ignored.
Learning disabilities are more global, and can be classified as mild, moderate, and severe.
In US English, what UK English calls an SpLD is called a learning disability, and what UK English calls a learning disability is called an intellectual disability. I think that's clearer tbh.
If you have an autism diagnosis, you are disabled. You don't have to call yourself disabled, but you might want to spend some time considering why not. Probably a hefty dose of internalised ableism - which is not your fault, but can be damaging, mostly to yourself. Remember, disabled is not a dirty word, and there are many many different kinds of disability.
(I'm autistic and have eight other diagnoses, all of which could be classed as disabling in their own right. I just say I'm multiply disabled nowadays, it's easier.)