What is app locking and how does it work? This could have been a google search but it didnt give good answers. By app locking, I mean when you tab out of an app and then tap the logo and then you tap "Lock this app"
Assuming you mean "keep open", that makes a little lock logo appear on the bottom right. It makes it so android keeps the app running the whole time. So it bypasses battery optimisations.
If you mean something else, mind sending a screenshot? One ui doesn't have app locking with a password or pin. The secure folder does that
I tested it and I think that all it does it just save it from being closed when the "close all" button is tapped, the app isn't saved in memory I tested with geometry dash, leaving it out kn a level and it reset me back to the loading animation before the home screen