Please, I would like to request MIUI.EU ROM developers for Xiaomi 11 Lite 5G to include “hide apps” option in the app lock menu for the next updates, it doesn't appear anymore. Thank you
Because "Hidden apps" and "App lock" are separate features.
You can hide apps without activating App lock, as it's now optional.
Security -> scroll down to toolbox -> Hidden apps.
Or, you can just search for it in Settings app's search bar.