Princess of Wales Kate Catherine is likely to address her health concerns at a public event, the UK newspaper The Times reported.

"I can see a world in which the princess might discuss her recovery out on engagements. If she was going to do it, that's how she would do it. I would expect that to be her instinct and it will be her call. They're not going to be rushed," the source was quoted as saying by the daily newspaper.

Earlier, Royal commentator Daniela Elser said despite being the one to take the photo, Prince William remained notably absent from public support, leaving Kate to issue an unprecedented apology alone.

King Charles, amidst his health challenges, refrained from offering visible support.

He wrote: "You and I should, by rights, know all about Queen Jane. She was the woman who, depending on which historian you ask and how close to lunch, was meant to be England’s first regnant Queen – that is, who ruled in her own right.

"Instead, nine days after the 17-year-old was forcibly pushed onto the throne by her father-in-law, the Duke of Northumberland, something Lady Jane never actually wanted herself, she was forced to relinquish it and was duly executed.

"At the end, even her father had abandoned her cause," he said.

Fans ask Prince William about Kate Middleton’s whereabouts, proof of life

Queen Camilla stands up for Kate Middleton against online attacks