Im hearing that he had a BBL.
Possibly. But he does have well developed legs in addition to the plump ass. In his first YouTube video (and the comments to that video), he admits to having a dancer background (jazz, modern, ballet). His ass fits that build a bit especially since he is also short. If it is a BBL, it still looks good af tho.
 
What’s the difference between a skinny and a regular?
Just searched on google for a quick second to find out cause I was curious too.

"A “Skinny BBL” or “Skinny Brazilian Butt Lift” is a body contouring procedure designed for very thin or petite patients who typically have very little fat.
Like a traditional Brazilian Butt Lift, a trained surgeon will harvest fat from areas of the body and strategically transfer the fat to shape and sculpt your figure.
If you’ve been turned down for a BBL because you’ve been told you don’t have enough fat, you may need a Skinny BBL specialist at Dr. Chicago Breast & Body Aesthetics."