The App Panel in the Admin menu functions as an admin to move to user mode, where admins will have the same features as users or users in general. The App Panel menu is in Side Menu as in the following image.
To return to the admin panel page after entering the App Panel page, you can click the Admin Panel menu, which is located in the header of the Account section, for reference see the image below this :
To learn more about App Panel, you can read the documentation section About Customer Panel