Why is samsung not adding its own app locker feature cause its a great feature to have. Coming from one plus devices one feature that lacks in my s20+ is applocker.
Samsung should add app locker features maybe in further updates
Use Samsung "S Secure" and "Secure Folder" If not preinstalled on your device then find find out from Galaxy store.
S Secure: Keep selected apps and its data private by locking or masking them. Locking and masking can be done via a pattern, PIN, password, or your fingerprints. Apps will be locked once it closed or the device screen turns off.
Secure Folder: Secure Folder is where you can keep those photos, video, files, apps, and data you want to keep private. It's an encrypted space leveraging the defense-grade Samsung Knox security platform, protecting your important information from malicious attacks.
