Eh, western militaries are holding a lot of weaponry back from Ukraine; like the vast majority of it. They have run low in a few areas that have been key in this war, like artillery shells, but that's in part because these countries haven't prioritized that production in recent history in favor of other systems.

I actually do think that the US and Europe should be moving faster to increase their military manufacturing capacity, especially Europe given the situation they are now facing. But to say that NATO countries have been throwing everything they have to Ukraine is wildly off the mark.