there's been murmurs about ME5 going UE5, but this is about as confirmed as it gets for me. I know they struggled with Frostbite before, but I feel the latter half of struggles (anthem and andromeda) were self-inflicted wounds rather than the engine. they admitted to not following up on the tools they made for Dragon Age Inquisition so they had to make them all over again. why I don't know. with Dragon Age 4, they're reusing the tools made with Anthem at least, but I think that will be the end of Bioware using Frostbite
anyway, onwards to the future, whenever that is