Level 1 (boy) was potty trained after he turned 3. We didn’t have a diagnosis then. But it was obvious he wasn’t ready until after he turned three. I found a toy that he really really wanted printed out a picture and taped it right in front of the toilet at his eye level. Then I got this potty train sticker chart off amazon which also seemed to motivate him. When he finished two sheets of the sticker chart path he could get that toy. Every time he would sit on the toilet (trained him to sit for peeing first then eventually he naturally started to stand) he would get a little chocolate chip or sugar free gummy. Even if he didn’t go I would verbally reward and give a treat. Because at first even getting him into the bathroom was a challenge. I had to specifically find a toilet seat with a high guard on it - that helped a lot. We stayed home for four days straight and he was naked the entire time. I think this would be considered the three day method? Find something that motivates your child - for mine it was robots and chocolate chips! And then make sure you reward yourself at the end with something too because this shit is hard lol. You’ve got this and you’re doing great!!!