William and Kate invited Harry and Meghan to visit - voila! celebs. William and Kate have suggested that Meghan and Harry bring the children and that the two couples and their families will try to reconcile, but the proposal is leading nowhere so far.
Archie and Lilybeth live with their parents, who abandoned the institution of the monarchy in California and spent very little time with the royal family before leaving England. Children had the chance to see the royals during Queen Elizabeth II's platinum jubilee celebrations, but they didn't make it.