I'm with Dove. I don't see why she shouldn't have had quite a bit to do with the design. She's not stupid and it's something that interests her.
Why should people be prejudiced against someone just because they are in the royal family? She wasn't born a royal. The Queen has done her best and worked hard all her life, she was born a royal but I don't envy her, having to do her duty, not always able to choose.
Don’t see why she shouldn’t have had a fair bit of input in it ...
... hope her involvement brings attention to, and benefits the charity involved.
As I think I’ve said before, the ‘R’ in RHS does rather imply that ‘they’ would have some sort of input ... 😉