On our last P&O cruise (Aurora April 2022) they had Portuguese Red, White and Rose alcohol-free wines in the MDR. My wife found them quite acceptable. I can imagine that availability might vary by ship.
We have just returned from Aurora 19 nights to Spain Italy and Greece. We had testing on day 3 of cruise and crew were being tested every 5 or 6 days. Talk was that quarantine cabins on B and C decks were being returned into service for the 5 May cruise