I CANNOT UNLOCK MY IPHONE 11. IT WONT WORK

Perform a Forced Restart on the phone. Follow the instructions very carefully. You may need to repeat this several times.

Force restart iPhone - Apple Support

There are only 2 possible results when you perform a Forced Restart:

1) The phone returns to normal operation.....or, if it does not.....

2) There is a hardware problem with the phone that will need attention at the Apple Store (make an appointment) or take the phone to an authorized Apple Service shop.

You can find a list of authorized service shops in your area using the link just below:

Find Locations

Try a forced reboot.

Press and release volume up, then volume down, then press and hold the side button until you see the Apple logo.

Then make an appointment, at the Genius Bar of your local Apple Store or take it to your local authorized service provider and have it checked.