Undoubtedly, there would be a small but vocal group who would be upset about an openly gay Crown Prince. But I think in today's European society, they would be quickly drowned out by the cheers supporting the young man.
In the last US presidential election, the question was posed could an open gay man with a husband possibly become president? While Pete Buttigieg did not ultimately get his party's nomination, his sexual orientation turned out to be a very minor factor. BTW, he is now part of President Biden's cabinet.
I might have to check out this show myself.
I would hope not, Gary (that it would be seen as a problem, I mean). The premise on "Young Royals", however, is that Wilhelm becomes Crown Prince on the death of his brother. I simply don't know whether it might problematical for some people to have a real queen as Queen.