That's another question: is Europe (the US being a no show these days) helping Ukraine enough?
And, yes, you could argue Europe should do more, give more, and allow Ukraine to strike deeper into Russia.
Remember, though, that Europe is pretty dependent on the US because, with rare exceptions, Europeans have decided to buy American stuff instead of producing their own armaments.
Things are changing, but slowly. Europe really is caught between a rock and a hard place.