To be honest, @woolgal if your meter and strips are being funded by your GP, then it's likely worth taking a view on what the average difference is and work with a bit of a mental correction as you goi along, then have a prompt A1c to sense check the approach.
This time of the year, with varied work and eating patterns, plus the inevitable COVID stresses, sleep atec., etc., even the most stable can have some wonkiness in their lives, so maybe let things settle a ittle more.
As T2s, wholly or largely depending on diet for our control, it's the trends we're looking for, rather then the absolutes. (Although, there's nothing nicer than a nice, neat little number shining back at us.) So, best not to stress too much on the numbers and look to the graphs and trends.
If after a few weeks things are still well adrift, you shrug and move on, or ask your GP is there are any other options.
Too many sources of data - all of which are subject to variations - are not helpful, in my opinion.