As I said, they didn't. The actual cash component they could be spent on drones is very small.

For example, of the $60 billion in military aid the US has given so far, in reality at least half ($30 billion) was in the form of mostly obsolete weapons taken from storage. Almost all of the rest was restricted to purchasing US made weapons.

The US does not make effective drones. The US simply doesn't know how. Ukrainian companies do.