No, I work with kids and some of the are neurodiverse. We do try our best (some of us anyway) but that doesn't make it easy. It'd he nice to have someone point out a behavior someone finds DiFfIcUlT like eye contact or stimming is just very common expected behavior for a kid with autism and there's nothing wrong with them just because of that.

If you're worried you'll somehow make them more autistic - well, I'm assuming you're joking but I'll say it anyway. No, autism isn't contagious, you can't make then "more autistic." To be honest, they'd probably get a kick out of someone that might understand them and their thought processes better than the average neurological person. You have nothing to be ashamed of and nothing to report.