I started with pee every two hours then I give him his favorite treat for number 2.
My daughter was doing the same thing we got a potty watch and it worked
We tried using m&ms as a reward but he didn’t care. Then we bought a 30 pack of play doh and everytime he goes potty by himself he gets one. So far it’s been working. We’ve been letting him run around naked. So far it’s been slow. He’s good at going pee in the potty now without help (as long as he is naked if he has underwear on he’ll go in the underwear) but he refuses to poo in the potty, he’ll just go on the floor
I started taking away my son's toys as in encouragement to get him interested. When he doesn't potty, a toy gets taken away forever. Once he realizes I was serious, he is started to use the potty as he didn't want his favorite dinosaurs taken away. Now he has been 2 months potty trained. He also turns 4 in August.