@Liv I can get him to sit like four minutes on the seat if I’m lucky and if I am even more like me people couple times here and there in the toilet so I don’t know how to get him to sit longer. I tried to toy that worked for a little bit got bored of sitting too, and wants to run around.
Does he have dry diapers for 2+ hours? Dry diapers after naps? If not, then he might not be physically ready.
I have been working with my son on potty training. I had him sit on the potty for 10-15 minutes at a time and he got a treat with every pee/ poop and started doing a potty chart. He loves the stickers. And I got a potty watch off Amazon to remind him to sit every 30 min, it vibrates and doesn’t stop until I turn it off while he’s sitting.