This is just a story to make people mad. Trump needed to meet the queen and the PM. The rest of the royal family are not important. They just ski and party. They have no national jobs. There were lots of people there to meet Trump. Many are big fans.
Did you see his meeting of the Queen? It was obviously a snub. For a supposed ally like the UK, they should have had more people with her. It looked odd, because it was.