Yes, but everyone scrolls through the shipments.
Mods are like the paperwork of the game. They are in no way fun. They can do a lot for you, just like having the right paperwork can do a lot for you -- say, prevent you from getting arrested for driving a car -- but that doesn't mean that paperwork (or going to the DMV) is fun.
This is a game.
By definition it's supposed to be fun.
If there is an aspect of the game that is not fun, the people that download SWGOH to have fun playing a game aren't going to be digging through paperwork.
Feel free to dunk on the people who say that the information isn't available. Have fun. It is, after all, technically not true and you should definitely feel superior to people who don't know something that you know. That will definitely not ever come back to bite you.
That said, there's a more limited request here that is reasonable: giving you some kind of warning when you hit the cap.
They already do this with mods. In fact, they're extra friendly about this: if you buy a mod and you don't have room for it, it sends the mod to your inbox where it waits for you to clear room.
There is literally no reason that there couldn't be more visual cues in the game about this.
Since everyone in the game scrolls through the shipments some times, you could post a "maxed out" image in red superimposed on the location where you can buy calibration mats. You could give a message whenever you are denied new earned or purchased calibration mats. You could even not really deny them, but send them to your inbox until there is room for them.
I don't really see this being high priority for CG. And it's certainly not a high priority for me personally.
That said, instead of focussing on how best to dunk on the people who didn't realize there was a cap, what if you just said, "Eh, I don't need it, but casual players might benefit and anything that makes the game more player-friendly isn't bad. Might be a good QoL update someday."
Seriously. It's not a terrible idea.
Even more seriously, if we **support each other** when folks come up with ideas that will positively impact the player base even when we personally don't need a feature, then CG is more willing to listen to us.
What's wrong with uniting behind that QoL updates are a good thing even if you personally don't use every feature?