The article doesn't offer much clarity on what the actual changes are.
It will classify around 23,000 vendors as licensed firearms dealers, making their gun sales subject to the checks.
...
Around 80,000 licensed firearms dealers in the US who are already required to conduct background checks.
Every vendor I've encountered at a gun show runs a background check, because they sell enough firearms they have an FFL.
If there is a waiting period you pick it up at local FFL like a pawn shop or gun store that collects a fee holding it.
The 'gun show loophole' referred to people that would bring a gun to a gun show and walk around with a sign saying it was for sale. Private party sale to another person doesn't get an FBI instant background check.
'Universal' background checks meant forbidding these kind of private sales.
But from the article, I don't think that is the '23,000 vendors' that are about to get a license requirement.
So I'm not sure what this change is actually doing and who it will affect.