I can totally see Team Biden deciding to triage GA & AZ late in the cycle and go all in on the rust belt trio + NE-02. I think the high growth rate nature of the sunbelt states has made them hotspots for inflation + they are the bearing the brunt of migrant crisis, makes them much more difficult for Biden to win.
It would be absolutely idiotic for Biden to triage Arizona. Unless we are talking about a 2008 Indiana fluke, you never triage a state you won the previous cycle regardless of how narrow it is. Trump made this mistake with Michigan in 2020 as well. Relying on the rust belt gives him zero margin of error and its not even that good for him up there anyway. In fact, I think Trump has better odds in Wisconsin than Arizona.