You can believe what you want of course AnnunciataZ. But that’s not answering the question, is it?
There are rules of protocol about all sorts of things, and while some have been relaxed, some are very much still in use. At QEII’s funeral and Charles’ coronation, for example, the seating plan in the Abbey was entirely dictated by diplomatic protocol, meaning Joe Biden at the funeral, and Jill Biden at the Coronation, were seated in the back row of the group of seats opposite the Royal Family members. That was said to be a snub by some in the US - including Donald Trump!
But despite the fact it was pretty foreseeable that a large section of the international audience would not understand the reason why and get annoyed, they stuck to the seating protocol. That was the foreign Kings and Queens first (in order of longevity), then heirs to the throne, then representatives of those countries where Charles is Head of State, then Commonwealth Countries, then the rest fo the world in alphabetical order. So the United States of America is in the back row…
The same was true of the recent Jordanian wedding, which various people elsewhere in the internet said showed that William and Kate weren’t that important as they were way back in the crowd. And that’s true, they are not, when the crowd contains several Kings and Queens - they will be seated behind all of them.