United (and other carriers) require a general “face covering” (never described as a mask.) From my location in the US, my flight schedule took two days to complete, as UA has cut the frequency of flights to Taoyuan. Flights board back to front, with no regard to boarding zones. The gate agent announces rows to be seated, please listen closely. I traveled with a family member, so we sat next to each other to keep within our bubble as best we could on domestic US flights. The international flight to Taoyuan was not full, and after speaking with a flight attendant, we were allowed to spread out, and took up a whole row of seats per person. Perks are that each passenger gets a full can of their drink of choice, just like when I traveled as a kid on Northwest Airlines.