The Queen:
1.The Queen and Philip have (for decades) often spent time apart from each other, so that's nothing new.
2. And the Queen is far from alone. She is watched over by her two Pages of the Backstairs:
Paul Whybrew (known as "Big Paul"), HM's most senior butler. He was the one who starred alongside the Queen in the James Bond thing during the Olympics in 2012. He also spoke to Michael Fagan in 1982, the intruder who broke into the Queen's bedroom at BP.
Barry Mitford, HM's second most senior butler. That's the guy who always stands behind the Queen at state banquets.
About the Pages of the Backstairs: Senior servants of the Royal Household (first appointed by Queen Anne in the 1700s), attending to The Queen and Prince Philip.
The office of the Page’s is located next to Her Majesty’s lift, which is at the entrance to the private apartments. A Page is with her at all times (at all residences). On the rare occasion when a Page is out, a deputy (another footman) will take his place.
The Pages serve the drinks and meals, deal with domestic arrangements and deliver the red boxes.
They are also the only individuals who grant access to members of the Household into the Queen and Prince Philip’s private rooms.
The control of access (according to Royal Central) dates back to the Stuart era when the Pages positioned themselves, literally at the bottom off the ‘backstairs’ or Privy Stairs, which led to the Sovereigns private apartments.
She is also watched over by her other personal footmens/housemaids. Some of them (including Paul Whybrew) is watching television with her, when Philip is absent. The Queen has also a close relationship with her dressers (especially Angela Kelly).
Read about when the Queen personally comforted one of her footmens in this article from 2009:
https://www.hellomagazine.com/royalty/200911192427/queen-elizabeth/footman-comfort/state-opening/
"The Queen has a special relationship with her servants," the source added. "She is incredibly loyal and cares deeply for all of them. They respond in kind."
3. She also spends time with family/friends and her Ladies-in-Waiting.
Prince Philip:
1. From the Richard Kay article:
At Wood Farm, with its simple furnishings and open fires, Philip does have help. There is a page, housekeeper, chef and footman to take care of him, but unlike the liveried Palace staff, he prefers that they wear ordinary clothes.
2. So (as one can see) he's far from alone. Prince Philip also has two Pages of the Backstairs: Stephen Niedojadlo (his most senior butler) and William Henderson (his second most senior butler). He is also watched over by several other footmens/staffers.
3. He also spends time with family/friends.