It makes me wonder if Charles was worried about the H&M wedding being a shitshow and started calling in favours to sort out the music, the sermon, and - via his known acquaintances from eg the then Prince’s Trust - the high profile guest list.
In hindsight, I think Charles was busting a gut to include Meghan’s cultural heritage including guests from the US involved in acting and humanitarian endeavours. The Clooneys and Oprah fitted the bill perfectly, perhaps?
Charles then volunteered himself for the aisle walk. And he was very gracious to Doria after the ceremony. He even arranged for M to be baptised into the Church of England a few weeks before by the Archbishop of Canterbury no less, to enable her to be married to H by the Archbishop in St George’s Chapel, Windsor.
All thrown back in his face of course.