In the real world, while the US may have provided the most weapons, etc. to Ukraine, European nations have provided a lot, from uniforms to shells to weapons systems to tanks to multi-role fighters to cruise missiles. And in the case of more sophisticated weapons system, training.
Ukraine also designs and manufactures some of its own weapons, e.g. the cruise missile that took out the Moskva, the Sea Baby drones used to attack Russian shipping, ports, and the Kerch Strait Bridge, and the underwater drone used a few days ago to hit one (maybe two?) Kilo class submarine in Novorossiysk.