The weapons are being donated by Countries and not NATO so in a way do not in theory demand a response to the use of “NATO” weapons, Russia has already threatened the countries Germany and the U.K. for supplying weapons not as NATO Countries but simply as the Countries in their verbiage.
It’s getting more like the script of Kelly’s heroes
https://www.bbc.co.uk/news/world-europe-64016599
Freezing in trenches, shortages of food, fuel, ammunition, cold weather clothing…. Nooo problem, we will send a band to cheer them up.