Uzbekistan seems to be a boxing powerhouse; is there a reason for this?

They won gold medals in this Asian Games as well.
Among the boxers who fought Crawford in the past, there was a fighter named Israel Madrimov, and he was incredibly good.
There is also a heavyweight boxer named Bakhodir Jalolov who has won Olympic medals.
Is the boxing infrastructure well-established there??
I am curious about the specific reasons why they are such a boxing powerhouse.