Why are all of the jewels Prince Harry is giving his wife jewels Princess Diana only wore post-divorce?
Because they are the ones he chose from the collection when dividing the inheritance with his brother. Camilla could wear state jewels that had, in the past been worn by Diana, and she probably has already. The monarch decides who can wear those. Neither Charles, nor William have any say in Harry’s personal income. Any sovereign grant monies allocated to The Duke and Duchess of Sussex, is at the discretion of The Queen.
How do you know that? Have you seen the receipts ? The boys divided her jewellery between them. And why does it matter?