Time of Troubles is long past and either the gods returned or are gone permanently. We are in 5e now. No, I don’t think Moander is back and he most likely won’t be considering he’s not mentioned in 5e. I don’t think Moander will have anything to do with BG3 if that’s what you are hoping.
Well you're the one insisting that gods who died in the ToT are back because of the 4e retgone...