Uh, you better check your history. In 1066, the royal family were still princes of a minor section of Germany, and William Shakespeare most definitely never wrote about them. In fact, the current royal family were not even imported to England to destroy the American colonies until 98 year after Shakespeare died. And then the inbreeding commenced.
My history’s fine. Windsor Castle, among others, is chock full of relics and tombs from every century of British history with no distinctions made between Tudor, Stuart, Plantagenet, Saxe-Coburg-Gotha et al. The line of succession from William to Elizabeth II is and has been meticulously documented.
The point, of course, is that the monarchy’s history is well known and that they have enjoyed what amounts to free publicity in the form of media coverage, historians’ study, etc. since the Battle of Hastings. It was, is and will forever be more extensive and lasting than popping into a food bank kitchen to pretend to cook organic potatoes for the sole purpose of a social media post.