Potty train w Autism??!

Okay so my daughter is on the spectrum, we just found out and she is 3. They say she is high functioning but one of the main concerns was that she cant stay on task or has a few familiar things she sticks to, toy wise.

But She shows no interest in potty training. We've sat her on the toilet for 30 minutes, nothing. As soon as she gets up and I put her panties on her, she will poop and pee in them. She doesn't care to tell me when she goes and definetly not when she has to go cause we haven't gotten her to pee nor poop on the toilet yet. She used to tell us when she peed and when she pooped but stopped a while ago and now it's like she has no idea what we are saying? We aren't rushing it but in order for her to go to pre school this coming school year she has to be fully potty trained and we dont think she will be. Its hard for her to learn things. Any help would be super appreciated