Not much being said about the Afghan army, and the speed with which it collapsed.
Multiple countries sent trainers there to teach the army how to conduct its operations, spending years and squillions of dollars on the effort and armament. Comes the time to remove the trainer wheels and see how much they have learned, they drop the bike and run.
What more can we do, other than stay and take the place of their own army, which didn't want to defend its own country? And standing in for them is one thing that is unlikely to happen. The warring tribes and ancient hatreds have returned.
Stand clear and see what happens after the dust settles.