Supposing this is true (hard to believe anything Russian sources say), this would make sense as Ukrainians had much less 155 munitions than Russia and the Allie

Supposing this is true (hard to believe anything Russian sources say), this would make sense as Ukrainians had much less 155 munitions than Russia and the Allies had a hard time helping them as everybody thought wars in Europe are a thing of the past. So this particular ratio may change in a year or two.