Any tips on to potty train child with autism?
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I’d use potty downstairs and toilet. I’d start putting her on either every time she looks busy which is what we did with our preverbal daughter and used signs. With my asd son we took the nappies away and went every hour although he was nearly 4 and starting school.
Our potty is a mini toilet with a flush button (contents don’t go anywhere obviously) but my son was scared of the ‘big toilet’ at first but was curious about the little one and being able to flush as you would on the toilet. Be prepared for lots of accidents as well so you have a response that is calm and not making too big a deal out of it because it can get frustrating when you think they’ve got it and then they don’t. Even when my son grasped weeing on the potty, he would sometimes have so much fomo that he’d still wet himself rather than having to go to the toilet. Pooing came much later as well which I wasn’t prepared for, my son would either hold poo or ask for a nappy just to poo in when he was otherwise in underpants
I think its a combination of the options you've listed above. I would suggest to continue to be patient with her and consistent. I would focus more on continuing to prepare her for the process rather than rushing into it. Utilizing visual supports like her watching you in the toilet and saying what you're doing like "... pulling pants down, sitying on the potty, doing a poopoo" etc. which helps her to put words to actions, routinely, positive reinforcement, reading potty training books? That can be highly effective in helping her learn and adapt to using the potty and make it a smoother ongoing transition. I think the potty as a start is better then the older she gets and the more she can communicate and the more confident she gets on the potty, then you can upgrdae her to the toilet seat. i think trying to start potty train them both from scratch at once will be more complicated and stressful so maybe just one at a time.