Indeed.
The American-made M270A1 and M142 HIMARS (High Mobility Artillery Rocket System) are able to fire a wide range of rockets and missiles. Both vehicles are d
www.armyrecognition.com
This actually show you two things.
1.) NATO Battlefield surveillance system (LINK) is probably the world most comprehensive.
2.) Russian really struggling to put up Air Asset in Ukraine.
Well, I don't think I need to talk about number 1. I used to work NATO communication and pipe intel thru different unit, while I can't tell you how extensive is NATO Link system, I will just say this, the sheer number of asset and the different type of asset provide a complete or near complete picture of any battlefield, this in the field are called Battlespace Intelligence (or Awareness) you know everything, then you in charge of the battlefield.
The second point is what I want to go deeper into. The value of Mobile Artillery (SPG, MLRS and so on) is that they can sneak into a prepped area and attack, then you have complete control of your target until a few moment after you launch, by then you would be some distant away. The only way you can deal with Mobile Artillery is air power, you need to close off the entire battlespace and relay any attack so your air force can look for those assets in the area.
Now, Russian supposedly have numerous different asset to deal with this, but the fact that none of the 20 something HIMARS are destroyed means they either didn't try or couldn't. Which spell problem for the Russian. Because air interdiction does not just deal with threat like Mobile Artillery, but you need them to support your ground operation. You constantly have CAP and CAS patrol the airspace and you give your ground element support in any situation that way.
So by not be able to deal with HIMARS effectively, you are letting one part of the battlefield being dominated by the Ukrainian. That is going to come back and bite the Russian on its a$$.
This is more serious than losing a S400 Radar or losing anything, because this is systematic, and there are only one result you are looking at, and that's completely lose control of the battlefield.