App locker

[BruceBhanu]

Not even the higer flagship mobiles are provided with app lock feature #S22ultra. Hope samsung consider this and provide this feature in the next update. 

[TheRabidCrow]

Use Knox? That may work for you or some third party apps.

[ѵօϲɑӀ4ӀօϲɑӀ]

Premium serious Samsung phones have Secure Folder which works way better than app lock in a lot of cases. So better try it once.

[Roshan5]

Use Secure Folder inbuilt

[Kashinath Gopal Kora]

Fantastic