I'm medically diagnosed autistic. I struggle with a lot. But some upsides I've encountered:

I tend to form stronger empathy and justice models, and commit to them wholly. This has allowed me to, for instance, work on improving access to benefits or healthcare for others while other people around me burn out. But I often fight way too long, and I get upset when people disagree.

I often hyperfocus on projects I'm interested in and can produce a high level of output if given an interesting task.

I enjoy counting, categorization, and organization tasks. Find all bugs that meet these rules, or, double check every unit test to check we're meeting coverage goals. Give me those tedious, repeatable, rules based gardening tasks and I'll churn through them all day every day.

I believe I have a more systemic way of thinking than my peers, and while this does cause problems sometimes it also enables me to decompose systems more easily.

I tend to maintain my cool under pressure or bullying. I simply do not notice nor care about emotionally loaded conversations. This causes problems often but also helps often, I can mediate with "we're here now, let's focus on how to improve".

These, of course, are not the upsides of every autistic person. They are my upsides for me. Again, I am medically diagnosed and do require support to operate as an adult. My childhood was... not good.

I do not want to say it's only upsides, but I do think for some autistic people there are things those people do consider up sides.

Edit: if I could choose to not be autistic, even with the massive burden it has for me, I would choose to remain autistic and I would fight tooth and nail against anyone who tried to change me to remove it.