The US has blown through a staggering amount of of our weapons stock piles, especially for air defense, in the Ukraine and the Middle East and we are running out of weapons to send to anyone at this point.
Germany and the EU have systems to send and probably should do so since they are the ones agitating for the continued fighting in Ukraine.
That (deliberate) blow down of the US weapons bank is one of three reasons the international globalists are so desperately promoting the Ukranian stalemate.