These folks do exist, I've noticed. I'm probably a bit more fortunate to see that representation because I've lived in very large US cities my whole life. However, I've noticed that they tend to be pretty damn inaccessible and not super diverse within themselves. They either have waitlists that are absolutely bonkers, don't take insurance, have some reason they aren't seeing clients for the foreseeable future, or some combination of the above. They also, much like the broader pool of therapists, tend to almost all be white cis women. Then add in, that just because you have something in common with someone, it by far still doesn't guarantee a good fit, even if it might increase the odds somewhat of it being a match. I managed to see one autistic therapist and she and I experienced so much friction within the first month that she then immediately referred me on to her ADHD husband.