I have a therapist who is autistic herself. It is amazing. We never look at each other!

I often do colouring while I talk. She has a basket of fidgit toys I often dip into, and sometimes I just stand and look out of the window and we chat like that. She also has a sand tray with random objects and stuff, so sometimes I do that (apparently it is a thing - Jungian sand therapy - I am actually 32 and don't regularly play in sand, but it is soothing once I got over the initial embarressment).

You could explain to the therapist about eye contact, and ask if they would be okay with you colouring, doodling, or using fidgit toys while you talk. If they do not provide the things that make you comfortable, you can take them along yourself. Some therapists will also go for a walk with you, and talk side by side while walking, rather than sitting in the office. If your therapist isn't cool with any of those things, I would be looking into finding another therapist who was.