How to remove activation lock on iphone 11

ONLY the previous owner who “locked” the phone can unlock it.

It will remain a non-functional device otherwise.

See:

How to remove Activation Lock - Apple Support

https://al-support.apple.com/#/kbase

This link allows you to remove activation lock. This may take days or weeks, or may not process.

Your iPhone's owner must not be logged in to a business account