Faster In-Display Fingerprint Scanner
Like the OnePlus 6T, Galaxy S10 and a few others, the OnePlus 7 Pro has a fingerprint scanner INSIDE the screen. It's next-level technology you'd see in a movie.
Underneath the screen, behind the glass, there's a small camera that shines a light up and reads your unique fingerprints. Once you tap your finger against the screen it'll start to glow, and the optical sensor reads the ridges and textures that are special to your finger, and only yours. It's very secure.
Go to Settings > Lockscreen & Security > Screen Lock > and give it a whirl.
Better yet, this feature is faster than ever before and vastly improved over the 6T which had it back in 2018. This is one of the main features of the phone so we're pretty sure everyone is using it. If not, you should be.