So does Israel. Israel receives checks for weapons and armaments they can resell, Ukraine receives loans along with the associated debt. It’s a regional power thing for the US, treat certain friendly countries at strategic hotspots in such a way that they hold key industries or resources others have to rely on, creating a situation of mutual dependence and giving an incentive for other countries to also support them. Ukraine has Europe and NATO right beside it, so it’s much less on the priority list for the US.
It also creates a bunch of problems, specially when it involves a country that’s borderline religious neocolonialism, and doesn’t work that well against large world and regional powers that are working together like China, Russia, or even Iran.