There are significant changes to the engine from UE5_EarlyAccess and the latest source.
First of all UE5_EA is a successor to UE4.26, so if you try to migrate UE4.27 content into it, it won’t work, while the latest UE5 source is a successor to 4.27.
Stuff made for UE5_EA won’t work out of the box in the release version, so this would create more problems than it would solve