I have iphone 12 it is owner locked how to unlock it?

If the phone is Activation Locked, and you don't have the credentials to unlock it – or proof of original purchase that is satisfactory to Apple – you don't unlock it.

Activation Lock is an anti-theft measure to make stolen phones useless to thieves and fences.

How to remove Activation Lock - Apple Support

Three users have already answered your question on your other post.

Please.....do not ask the same question multiple times. The answer will not change.