There’s no gun show exemption. There’s a private sale exemption, because the law doesn’t allow private sellers to access the background check system.

Registered FFL holders selling guns at a show have to do the same background checks they’d do anywhere else.

There never was a gunshow exemption. Federally licensed dealers must follow the same process to sell a gun no matter where they do it - at their brick-and-mortar store, at a gunshow, or in a parking lot. Individuals can sell a personally owned firearm to anyone in the same state with no check, and where the sale is made has no relevance.