My last solo cruise with Princess was on the Island for September 2022. I don't remember any staff member showing up at any of the solo meetings (which was listed on the daily program). There were about 10 solos who showed up on a regular basis; most of them were finishing up their 2nd cruise on a B2B cruise, so they were pretty comfortable with one another. I usually ate dinner with one or a few and hiked together on port days (we went to Iceland). The majority of the solos were in their 60s & 70s. As usual, the women outnumbered the men 6:1.
In regards to the Island, I don't recall much about the food & dining experience other than there were long waits for dinner at the MDR & the staff was flustered. It got better once I figured out how to use the Medallion app (which had given me a lot of trouble for several days). I won't return to the Island unless there is a great itinerary with a commensurately great fare. The ship is showing its age, as there had been a plumbing problem in my cabin that I had not caused. The Island had also been my very first Princess cruise ship & that was in 2004!
I'm returning to Princess for 2 Caribbean cruises in late January (check my signature for details) - first the Sky then the Caribbean (fingers crossed as the Caribbean is the Island's sister ship).
Most of my solo cruising has been with Norwegian. The kitchens at Norwegian may be a touch below Princess but they take better care of their solo travelers. There's still variation, however, depending on the activities staffer who had been assigned to head the solo traveler meetings. I've been on 8 NCL cruises - 2 fantastic staffers, 2 duds, and the rest were acceptable.