Type of cancer and condition: That's why there is no new statement from King Charles. Your theory is currently being confirmed at least on the palace's official Instagram page, where help with suspected cancer is currently prominently offered.
There is also information on how best to support people with cancer who have just been diagnosed. After all, Prince William set out to represent his father and attended an appointment on his behalf. Queen Elizabeth II and King Charles didn't want to become history, they still wanted to serve their people most of all.