So I'm not allowed to see how much data usage certain apps use?!?

"Restricted" means the app has been limited by your Android on the amount of data it may transmit/receive as a background app. The app settings assume you're on a meterd or low-volume data plan, and so they don't transmit data except when they're active, or up on your screen.

Their upload/download tallies will still count in your Network accounting. Frankly, your screenshot looks like something I'd expect. Nothing untoward seems to be occurring.

Let those other restricted apps 'run in background" (an app permission) and you'll see a different picture.

I think it just mean you blocked/restricted these app's internet access.

I'm all for de-Googling, but... is it possible that Restricted in this context mean those apps have no data usage because they're restricted from using it? It could be trying to say that the app is restricted, not that you're restricted.

I think this is your phone doing you a favor, dynamically restricting the apps so they don't misbehave in the background.

Are you confusing the words restricted with redacted?

I get the meaning of restricted, but I don't think this makes sense here. My list of restricted apps has apps with small but non-zero data; so why is the list implying that restricted apps have no data used.

Seems like the source for the "issue" stems from settings?
https://support.google.com/android/thread/113796911/in-data-usage-settings-apps-show-restricted-instead-of-showing-actual-usage?hl=en

If the features and vocabulary are a lot, Maybe Android isn't the right choice