Update Google Drive app
This feature was rolled out with the May update 4.2020.18204 and it lets you enable iOS' inbuilt Touch ID and Face ID. The process of activating the lock is really simple. Proceed to update your Google Drive from the App Store. Update and open the app and tap the hamburger button on the top left. Select Settings to view the options.
You'll find Privacy Screen as an option. Select it and enable the toggle switch next to Privacy Screen.
Now, Touch and Face ID are enabled for Google Drive. You can adjust the delay ranging from immediately to After 10 minutes. I keep it at immediately though.
Also Read: How to Enable Touch ID and Face ID on WhatsApp
Updated: October 10, 2021