Not only do the children outrank Meghan, but their dog probably would outrank the "Duchess".
Same story that pops up this time every year when Harry attends the Well Child shindig. Will he visit the King and everything will fall into place....after the Royals meet his "demands"? In any event even if Harry traveled and stayed at Balmoral for a visit, he would have security at Balmoral, but he steps outside of the estate and he has his own security...if he would want to visit whatever as a private visit not a Royal engagement. This visit to Well Child still is a private visit to a private function.
Toward the end of this month and definitely Oct., the "will the Sussex family get invited to Sandringham for Christmas" stories will begin. This twaddle is all put out by the Sussex PR flunkies.