How to unlock my iPhone 11?

Click on this link to learn what to do https://support.apple.com/en-us/HT201420

From your screenshot, it looks like your phone is carrier locked. You either need a sim card from that carrier or ask the carrier to unlock your phone.

Hey there ,

See ☞ If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad - Apple Support

Good luck!

See the article: If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad

If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad - Apple Support

You've been told multiple times what to do. Read the previous posts for the answer.