Hi Branok, You are correct, This Account setting page does not have hidden Music/TV/Book purchases; only hidden Apps. I did some more testing on different devices and macOS versions and I found a solution for at least accessing hidden music with an iOS device (steps at the bottom).
Paging Apple Support, you broke Account Settings with updates!!!
This issue seems to be with macOS 14 and associated App versions included (maybe macOS 13, but I have not confirmed). I found there are NO issues accessing Account Settings from Music and TV Apps on macOS 12.7.3 (with the same AppleId), and viewing hidden purchases and all items we are discussing.
***If fact, on the TV app for macOS 12, when I access Account Settings, I can see hidden purchases from Music, Movies, TV, App, Audiobooks within the same Account Setting window (with tabs on top to change category). This is not case with macOS12 Music App, only the TV app.***
Solution for Hidden Music (using iOS device):
I was able to view hidden Music purchase on an iOS device. I tested this on my iPhone 11Pro iOS 17.3.1.
*Note, I do not have Apple Music subscriptions and all my music is locally synced from a computer or purchased/downloaded on iTunes Store. I am not sure if having Apple Music will changes this.*
1) Note: do NOT access the Accounts page from iOS Settings.
2) Open Music App
3) Click the profile icon (top right of screen)
4) Click Account Settings on the next page
5) From this page, I am able to see hidden music purchases
**I also tried this with the iOS TV app to view hidden TV/Movie purchases. Unfortunately, I was not able to access those hidden items. When you follow the same process on the TV app, it only shows hidden apps (similar to macOS)