Haven't flown UA in a few weeks but my recent TPE-BKK roundtrip on TG was very quiet.
The return - everybody had a row of 3 to themselves in Y and the back section was completely empty - probably a load of <10% in Y.
I have several UA flights booked between now and March, mostly international, and the seatmaps look very sparse (I am the only seat in C assigned trans-pacific both directions for example)
Yes I know seatmaps don't tell the whole story but I have never seen them so empty...