Potty training SEN child

My son has struggled especially when wearing pants so we kept pants off so he learnt to go for a wee or poo on the toilet and then we added in pants because he gets confused with it not being the same comfort as a nappy and it being a new sensation. When my son has an accident we’ve been asking “where does our wee go” and when he tells us the toilet we agree and tell him to try and make it go in there which has helped, it has taken us a lot of patients aswell and sometimes feels it would be easier to just give up we’re now on 3 weeks and accidents still happen but we’ve been getting there it’s just taking a bit longer than others xx

When we trained our son it took months of him recognising the sensation of feeling wet once we took the nappy away. School nursery actually started as he was putting his hands down his nappy. Basically we spent that time basically catching it. We would write down times so we could work out a pattern. I brought toilet balls and said they were monsters he needed to kill. He used a potty or the toilet. I also used the iPad a lot to bribe him to sit!
My youngest was pre verbal and I used to put her on the potty every time she looked busy. As her facial expression would change.

I'm always worried I'm not doing enough for my autistic non verbal son because he really struggles with potty training. My son can't tell when he needs to go and he doesn't communicate that he needs to. So I set up a board with times to go to the toilet where he can put ticks, nearly every hour and after school. I was hoping the routine would help him to recognise to go to the toilet. He has a seat with steps, he doesn't like sitting on the toilet yet. It has been one of our biggest struggles but this routine with positive reinforcement has helped him used to going to the toilet and reduce meltdowns. Different strategies will and won't work though.