I think it depends on if he somehow becomes president or not.
If he doesnt, maga will die with him. If he does, all the rules will have been changed and all he needs to do is appoint next in line. Even if people don't agree with the person he appoints, or the party tries to put someone else in their place, it will be too late.
Joseph Ladapo was handpicked by the governer during covid. The governor was fully aware of his views, and was chosen on purpose.
His policys from ending school quarantines to sending kids to school with measles, have been widely publicized. He even has been caught altering covid vaccine data to fit his narrative. The CDC even rebuked him in a letter .
Despite being found altering data, he was confirmed for a second term.