I think Kevin Maguire was once the editor of The Sun? A nasty piece of work if it’s the man I’m thinking of.
Certain things are constitutionally required of the monarch such as giving the Royal Assent to statutes, but documents are brought to her for signature amongst the red boxes which she attends to daily, wherever she is.
It has been proved during the lockdowns that her physical presence is not essential to undertaking her role, much as people probably like to see her. A possible exception might be the opening of Parliament but I really don’t know if her physical presence then, as opposed to via video link, is constitutionally necessary. Doubtless someone will consult Prof Google.
A regent would I believe only be required if her mental faculties were to fail, but from what I’ve read and seen (for instance her message to COP26) I don’t see that happening any time soon.