ARE THERE ACTUALLY 20 KONGS IN KONG: SKULL ISLAND?

Yes, because there are different shots of Kong, but in every different shot it's actually a different King Kong. This is further backed up by the title of the 2020 kaiju movie, Godzilla vs Kong, because “Kong” is actually the plural varient for many King Kongs. Legendary Pictures just didn't want to give away the twists of multiple Kongs in the Monsterverse.

BUT'S THAT JUST A THEORY.

A KAIJU THEORY!!!!!!!!1111