The only time your iPhone 11 requires a passcode instead of a Face ID is it has been idle for more than 24 hours OR if it was completely shutdown and restarted. You appear to have been asked to enter your passcode every single time you wake the iPhone. Can you try to Force ReStart your iPhone and see whether this issue persists? Thanks and below is how to do it.
1) Force Restart the phone:
- Press and quickly release Volume UP button
- Press and quickly release Volume DOWN button
- Press and Hold the SIDE button until an Apple logo appears then release the Side button (Can take up to 20 seconds. DO NOT release Side Button when invited to Slide Power OFF).
Axel F.