Accidental cincturing in persimmons?

I have several persimmon seeds sprouting in 2021. Three years later, two of them that I kept grew to 6 ft tall and flower buds are showing up. Is it normal for seedling persimmons to start bearing so young?

I am wondering if the early bearing has to do with past restriction on the barks. Last year I planted cypress vines near the trees and they climb up the trunks and left marks after the vines were removed. Cincturing or girdling is a common technique in commercial fruit crops such as grape, mango, jujube, lichi and persimmon. Done after flowering, it prevents carbohydrates from going to the roots and increase fruit seeing and yields. I read about people tying wire around the trunk to make dwarf tree so that's the same mechanism as vine strangling.

I'd be happy to if my persimmons stay small but productive. Has any one tried growing dwarf fruit tree by cincturing on purpose?

Amerucan persimmons bear young normally from what I've observed.
Three years is about right so hopefully you have enough trees that at least one is a male and both will bloom at the same time.

The trees will still get huge I imagine in spite of the cincturing.

I compared the flower buds to those from a known wild female tree and they look different.  Both tree are males. I heard male seedling tree bloom earlier than female tree. Maybe I will try grafting next year.