It takes 38 states to enact an amendment. It only takes 12 small red states to block it. That applies whether it's passed by congress or by a convention of the states.
The Equal Rights Amend failed to get enough states before the deadline set by congress. Several states have approved it since the deadline to get it over the 38 but it's a dead issue unless congress tries again. Idaho initially passed it before really looking at it. Then they voted to rescind the vote. Some from liberal states say a state can't change it's mind but the constitution doesn't say that.
If repealing the 2d ever gets into congress, you can bet that they won't set a deadline this time. They'll keep alive for 100 years if necessary.

“In a time of deceit telling the truth is a revolutionary act.”
― George Orwell

It's not over when you lose. It's over when you quit.