It looks like Ubisoft may have had other reasons for delaying the game; Acording to journalist/insider Jeff Grubb, the state of Avatar: Frontiers of Pandora is not the best; the game is visually pretty, but the gameplay is rough shape, which would have led to the delay. The information is reportedly from a month ago, which means that the problems are still likely present in the most current build of the game;
View: https://twitter.com/JeffGrubb/status/1550149593698017280
What I heard is that the game looks pretty and the gameplay is in rough shape. This was about a month ago.
View: https://twitter.com/JeffGrubb/status/1550149593698017280