Because they were not in our possession. The assets were given to the Afghan National Army over the years to equip them. The Taliban captured them from the Afghans.
These "we left stuff behind" posts are getting old. It doesn't take much work to figure out what happened.
So, we didn’t leave Bagram airbase behind either? Okay yeah right uh huh sure. Blackhawks are so difficult to locate. Yup.
Either way. We should have had a contingency plan. They got lazy.