They did. Why didn't you check?
U.S. troops disabled 170 vehicles, aircraft and weapons systems that they abandoned Monday at the Kabul airport before the remaining American service members in Afghanistan boarded the last flights out of the country, the top U.S. commander in the region said. About 70 Mine Resistant Ambush Protected vehicles, 27 Humvees and 73 aircraft were “demilitarized” by the U.S. at Hamid Karzai International Airport before they left Kabul for the last time, said Marine Gen. Frank McKenzie, commander of U.S. Central Command. “They’ll never be able to be operated by anyone,” McKenzie said of the equipment. “Most of them were non-mission capable to begin with.”
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US military says troops disabled equipment before abandoning it at Kabul airport
Source - Stars and Stripes
And from here:
Did US Leave More Than $80B Worth of Equipment to the Taliban?
For equipment that couldn't be moved out of country, they tried to destroy or
disable it. Gen. Kenneth McKenzie, the head of U.S. Central Command, said during a press conference on Aug. 30, 2021: