Honestly, while the queen will be pleasant, and says she regards them as members of her family, I don't tink that they will be invited to Trooping the colour on a regular basis. They will be invited home at times and she'll wnat to see Archie and the baby..That may be their intent as of this moment, but it doesn't really solve anything for them. I don't think anyone seriously believes they thought they were doing the world in general a favor by dishing about the royals on Oprah. They did it because their business model (such as it is) requires them to stay in the headlines. That hasn't changed, nor has the fact that it will be difficult for them to stay in the headlines long-term without continuing to dish about the royals in the media. But if they keep that up, they aren't going to be doing things like Trooping of the Colour and vacationing with the Queen, because there will still be a rift. If Harry wants the pseudo-part-time-royal thing to happen, he's going to need to make some lifestyle compromises, and he's going to need to persuade Meghan to go along with them.
As for Charles I think the fact that he did refuse H's phone calls for a bit, shows that he found H impossible to satisfy....