I don´t think it has been reported here previously, and some might have missed it (I had). Prince William, Prince of Wales has been promoted in all three branches of the armed forces:
https://www.thegazette.co.uk/notice/4479765

He is now a Commander in the Royal Navy, a Lieutenant-Colonel in the British Army, and a Wing Commander in the Royal Air Force.

The promotions were dated to 11 August 2023, the same day he was appointed Colonel-in-Chief of the Mercian Regiment and of the Army Air Corps.