Partly true. We trained them to fight with our troops technical and tactical air support. We never took the training wheels off, Biden and his CRT brass knew this, they could see the Afghans couldn’t survive without our support in the outer tribal regions, but Biden kept the insane Sept 11 / Aug 31 deadline.
I have heard this previously that the ANA could only fight when supported by US intelligence and air support, but if it is true then the blame lies with the Trump administration who set a May 1st, 2021 deadline for withdrawal, conditions based.
Four years under Trump was enough time to remove the 'training wheels' from the ANA.