The capabilities in this announcement include:
Ammunition for High Mobility Artillery Rocket Systems (HIMARS);
155mm and 105mm artillery ammunition;
60mm and 81mm mortar rounds;
Unmanned Aerial Systems;
Tube-launched, Optically tracked, Wire-guided (TOW) missiles;
Javelin and AT-4 anti-armor systems;
Small arms and ammunition;
Demolitions equipment and munitions;
Chemical, Biological, Radiological, Nuclear protective equipment;
Spare parts, ancillary equipment, services, training, and transportation.
US earns a lot of money, and can afford a huge debt, by being a global superpower. By projecting power abroad, it also projects support for American businesses on worldwide markets. This is how the US earns enough money for a huge military budget, used to project the power. And all of this becomes possible thanks to alliance with European and other countries.
Current Russian invasion in Europe is about vital US interests. Support to Ukraine requires a rather small fraction of the US military budget. Failure in Ukraine will cost much, much more - probably including the American lives.