I am. It's a long and arduous route, but in the end it was succesful for me. I realize I'm very lucky. Though I'm also a shell of the person I used to be, not in the least because of this lenghthy and debasing process.
I also have autism but I got through the school system (with depression, self harm and general feelings of not being able to take it anymore, slowly burning out) I was convinced that I should be able to work some kind of job, it surely couldn't be worse than shool lol. I was still in denial and convinced myself I should just keep trying. After several mental breakdowns. (This is a long story and took about 10 years, trying different jobs, which all ended in mental breakdowns, I won't bore you with it) I only got diagnosed with autism when I was about 26, that means I qualified for some different jobs and there were some promises of accomodations. This didn't work out either.
There's a lot of pulling and pushing involved where people will try to get you to work no matter what. This led to the biggest breakdown I ever had in 2020.
After that I got approved for disability benefits, with the prospect that I'd be able to work again in the future. After several years of severe suicidality I got put into the category for people who are 100% unable to work.
I agree with the poster above that you need to find doctors/psychiatrists/psychologists who are willing to help you. Your disability needs to be proven with lots of documentation. I never gotten a lawyer, but that's also a very good point. Their opinions carry a lot more weight and they can possibly guide you through the process, which it mentally exhausting on purpose.
My mind is going blank now, I might have forgotten some things, the process is also different depending on where you live. But I wish you the best of luck.