That’s because they had no choice.
They were exiled and forbidden to return to the U.K.
They were however allowed to remain within the Common Wealth.
The only time time Wallace did return was when Edward died and she departed right after the funeral.
Queen Elizabeth was very gracious and allowed Wallace to stay for a couple of days.
Reliable (advisors around King Charles III) rumor has it that the same rules are being planned for Harry and Meghan. Exiled from the U.K. Unless special permission is granted. Permitted to reside or visit the Common Wealth.
Yeah, the UK doesn’t want them and neither does the US..