That's probably because the Afghan Air Force didn't have any Apache or Chinooks. A point which many seem to miss is that, with the exception of the State Dept Sea Knights, the aircraft weren't actually the US's to recover: they belonged to the Afghan state. Oddly, the US government has helped to fuel the misconception by talking about the disabled aircraft as being 'left behind'.
BUT the US did and they used with the Chinooks alongside the CH46 to evacuate the Embassy covered by Apache, they also used Apache to clear the runway ahead of the C17 in the early days, so either they loaded them in a C17 which is probably doubtfull or they flew them out of Country refuelling at some point along the way, Because if they were still there you could bet the Apache would be spread all over the news courtesy of Taliban media.
2) the Taliban don't need aircraft to terrorise the population (they're capable of that anyway) but aircraft might have helped it to fulfil its undertaking to suppress international terrorist groups;
Or hanging people under Blackhawks