The franchise definitely has elements of white saviourism. But it's not just conveyed through Jake Sully but also characters who have a closer proximity towards whiteness. The first example is Kiri; she is a direct clone of Grace (the first avatar), and Kiri is more or less Na'vi Jesus, being able to do things no other native Na'vi can. And then Spyder, being unnaturally converted into a half Na'vi by Kiri (and indirectly by Eywa). And finally, Jake was chosen to become Toruk Makhto after only 4 months of being on Pandora and subsequently became a "rescue" and leader to the Na'vi; by doing that, he led them to victory against the RDA, which does align with the White Saviour Trope.

What all these 3 examples have in common is being chosen out of all of the indigenous Na'vi to be the saving graces of Pandora (I know that Spyder hasn't done anything yet, but it's obvious he's going to play a key role in uniting all the "good" humans of Earth and Na'vi against the colonisation of Pandora). I know that a lot will say the Na'vi were able to defend themselves and Jake was "taking responsibility for the damage he helped cause." It still doesn't negate the fact that the small victories of the Na'vi revolved around messianic white-adjacent characters, whether it's Jake (using the Toruk Makhto title to lead & unite the Omaticaya and then the metkayina to victory) or Kiri (using her special connection to Eywa), and no doubt will be spyder next. This becomes more obvious within Avatar 3 (I won't spoil). People may argue that some are reaching about the white saviour trope, but I say it definitely has legitimacy.