People are going to conspiracy theory around, but my honest guest for why it was removed was because it was not accurate.
I mean, it was accurate in the way that it would tell you how much storage it was taking up, but you could sit there and watch it slowly tick up and down, especially after a software update, and that’s not particularly useful in the moment.
For example, after installing the latest 18.4 beta on my iPhone, the Apple Intelligence storage being used shot all the way up to 7 GB… before quickly falling back down to a much more reasonable 3-4 GB.
Not exactly useful information.
Still, the fact is that it is a beta and might very well just be a temporary bug