At home we do mostly whole food plant based, so no sugar.
But he does have fruit. If he wants something sweet to top or to bake (I buy pitted noor dates from Winco bulk bins), I add dates & water to a blender to make him date paste.
Or I add dates to a food processor and process a bit, then add oat flour until I can roll them into balls. You can add nut or seed butter too.
For frosting, I bake a white sweet potato, remove skin, blend in blender with a couple dates & some plant milk or water. It makes a “butter cream” texture frosting.
I just make these things because they are fun and my son is 3, lol.
I don’t limit fruit, or dried fruit. I think all the fiber & antioxidants are good for him.
At the grocery store he picks out his fruit & veg too. So he has a lot of control and it doesn’t bother me.