I guess, we see Ben act so often of his own volition, it just seems strange that Anakin would not do the same, especially as Luke is at his most “connected to the Force”.
So, unless Anakin was prevented from speaking to Luke and willed Palpatine to return union I’m êtes and rebuild his forces on Exegol… it still seems like a plot hole. Not one that can be fixed really, but still one that is there.