My iphone 11 is off and won

Next would be to follow the section “If your iPhone turns on but gets stuck during start up“ at https://support.apple.com/en-us/HT201412

Try a forced restart. First take off any case. Then:

Press and very quickly release the volume up button. > Immediately press and very quickly release by the volume down button > Immediately press and hold down the side button and keep holding the side button until the Apple logo appears, release the side button.