Of Oneworld Airlines, only 4 operate double deck aircraft (British Airways, Qantas, Malaysia, Qatar), all of which are A380s. Malaysia will be selling/retiring theirs soon. Qatar and British are currently flying them, and Qantas will start flying theirs again soon. With COVID restrictions and demand changing, it's hard to tell where they will be flying later this year. I know Qantas will start flying LAX to SYD in March on the A380, but it remains to be seen for how long. Pure guess, but, if the travel restrictions relax as expected, I am sure there will be a large demand this year, and quite possibly Qantas will keep this on that route, as well as on DFW to SYD. The advantage of Qantas is that they also refitted their A380s. Qatar and British Airways still have hard products that a quite inferior to the rest of their fleet (BA and Qatar have suites on many of their 777s).