The King, Queen and Prince of Wales are all wearing the insignia of the Order of the Garter
Princess of Wales is wearing the Royal Victorian Order (also wore it at the Coronation with its full robe, as did the then Countess of Wessex and the Duchess of Gloucester).
The Garter is senior to the RVO, and it's likely the PoWess will get "promoted" one day (the then Duchess of Cornwall got it in Jan 2022)
The yellow bow with a cameo portrait of the late queen, worn by both the Queen and the Princess of Wales is the Royal Order of Queen Elizabeth II (given for devoted service)
King Charles hasn't bestowed any of his Royal Orders yet - so we don't know what colour the bow will be for his - I'm guessing green (to match his environmentalism) runner up guess purple (to match his coronation pyjamas tunic)