You could try doing some homework.
The US is sending 155mm DPICM.
https://www.globalsecurity.org/military/systems/munitions/m864.htm
This is excellent stuff for counterbattery, which seems to be mostly what the Uke 155mm guns are used for.
The more likely use of MLRS, if available in some numbers, would be to use up the huge stocks of M26 series DPICM, which was its primary ammo. But Ukraine had only about three dozen such launchers (HIMARS and M270 MLRS). So they are better off sniping with GMLRS. ATACMS seems better used against distant infrastructure (hint: a certain bridge).
And you could get a grip on reality, the tubes we sent have mostly been destroyed, so having rounds for the destroyed tubes are not an upgrade. 155 max range +/-18 miles. 42 out of the MLRS. ATACMs is the only system that will have a strategic effect, which is what the Ukes needs or they might as well hold them to their stomachs.