Confusing validation error when importing unsupported Pokemon to SwSh

[Leff]

When I try to transfer pokemon to SwSh a lot of them are invalid with just saying "Invalid: Incorretly transferred from previous generation." or sometime invalid moves/relearn moves as well.

Isn't there a better way to make clear that this is just not available in SwSh at all when trying to transfer? I always have to check with e.g. https://serebii.net/swordshield/unobtainable.shtml to be sure the validation error is because of that an not some other issue.

Thanks