The USA is sending or has sent 40,000 155mm rounds:
https://www.19fortyfive.com/2022/04/ukraine-will-give-russia-problems-thanks-to-u-s-155mm-howitzers/
Furthermore, the systems they are being sent not only outrange most Russkie artillery, they are far more accurate than Russkie artillery, with deviations of only a few meters. Most Russian artillery doesn't even hit its target!
No, the average 155mm round with the M777 howitzer is outranged by the Russian gun in similar caliber by about 17%.
And no indirect fire weapon hits within “few meters” except with precision munition.
Russia has them, Ukraine doesn’t. 40,000 rounds are nothing for this sort of conflict on top of that.