I wasn't following this thread since posting earlier, my apologies.
I never looked of that *Systems Apps list after day one.
Glad you found it. My Cleaner was turned off anyway when I looked.
I don't think I had a Cleaner icon on my screen originally. (Poco F2 Pro)
Under my Settings - (Apps on MIUI 14) it lists Systems Apps* first,
then Apps - Manage Apps where you can hide or show background apps.
By *System Apps they should really list them as MIUI / Xiaomi Apps, i.e. cloned versions of regular apps, or however they are termed on a Samsung or similar UI.
I really forget the few hidden options for turning off regular ads and other distractions. I found a few You Tube videos when I originally had MIUI 12 or 13. Many Apps or Settings have a Preferences or something you could turn off; and it was also advised to Force Stop "msa" in the Apps list. I also never signed in to the Mi browser. Redmi models were harder to rid of adverts in the past, but I think they have improved.
Here's something I found :