As long as Trump resides in Florida it’s the responsibility of Florida Law Enforcement to enforce it, and I doubt they’ll exactly be busting their butts to do so.
DeSantis has already said Trump’s FL voting rights will be ‘restored.’ Which are the only ones he uses. Don’t know if same process can take care of his FL gun rights. But guns at non-FL Trump residences require thought and action to the extent local anti-2A laws still apply there.