4 year old doesn't want to know

[KaWe]

I've tried to get my son into training pants, even having the feel of normal underwear and speaking encouraging to him. Told him that we will do a reward system.
His answer is no. He's diagnosed autistic now. He will stay sat in those wet training pants, it doesn't bother him. We tried potty training when he started to say "nuggets" but we've never got him trained. He has no interest. He's quite happy to pull his cover down and pee on the floor and watch it. I don't know whether it's clinging to what he knows. He's got the toilet top, a potty toilet that flushes, paw patrol potty and travel. They're always ready for him to use, but he only has interest in playing with the flusher. The day he will take to just doing this, I will celebrate.

dd wasn’t diagnosed when we potty trained, but we did big rewards with her.

We always had a prize shelf that had little trinkets. Mostly things from party bags, sets I split up, stickers, just that tiny cheap taat kids love.

when we started potty training, the sticker chart literally was set up so that one star earned a trip to the prize shelf. Any pee in the potty, you get a prize. Then after a day I swapped the chart and it was 2 stickers. Then 3, etc. eventually we moved on to more solid endeavors. Then at some point she got independent enough and just wanted to get back to playing and she stopped wasting time putting stickers on her chart.

after a few weeks the prize shelf was repurposed for another skill.

and eventually she outgrew it entirely.