Of course at this particular time the country doesn’t need an abdication and it certainly doesn’t need a Coronation. However after the queen’s father died, her coronation was about a year later, so no problem there. An abdication at this time though would be very unsettling for the country, but as Framilode suggested, the Queen could retire and Prince Charles could be made Prince Regent. I really think she should, and I’m afraid that I regard her as stubbornly sticking to her role when she should, in my opinion, give up the small amount of power she does have, and let Charles get on with it. If the Queen lives as long as her mother, we have another 7/8 years of this, and by then Charles will be in his eighties. The Queen’s retirement would avoid this, and allow her to live with her husband, as she has been doing since lockdown anyway, and Charles would get on with the job he has been prepared for all his life. However it’s obvious that the Queen has no intention of doing this, which personally I regard as stubborn and selfish. As is not wearing a mask, with the consequence that William couldn’t wear wear one either, as royal protocol dictates that that the family follow the example of the Queen. (Interestingly, without wishing at all to make this thread about Meghan, that was one of the points about Meghan, that she refused to follow royal protocol, so for example, she refused on occasion to wear a hat when the Queen was wearing one, and the queen prefers all royal ladies to wear tights/stockings, and Meghan frequently didn’t.) I think some of these protocols will disappear with Charles as King.
Whatever, the last thing the country needs is either the Queen or Philip to die at this time. This would create huge problems as normally they would have a state funeral.