Many phones these days provide an inbuilt app locker. You can find this option as App Locker, generally under the Utilities option. You can simply open the option and select an app that you wish to lock. Now every time you wish to open that app, you will have to enter the phone lock password or authenticate using fingerprint sensor, if your phone supports fingerprint.Alternatively, if your phone does not support this feature, you can download the app named app locker from play store.You can find it here.Configuring it is easy.Download App Lock from the Google Play Store.You will be asked to set a pattern lock when you launch it for the first time.Then you need to configure an E-Mail ID for security and backup purposes.Under the Privacy tab, you can find a list of apps installed. You can select any one of them to lock.Now whenever you open the app you have locked using AppLock, you will be asked for a password.You can also unlock it using your fingerprint.You can check the video here:You can check the specs of Xiaomi Mi Note 10 Lite here: Xiaomi Mi Note 10 Lite