I want to unlock my I phone 12pro max locked to owner

Hello~ Take it back for a refund. That iPhone is activation locked and there is nothing that can be done to unlock it. Click on and read below…

Activation Lock for iPhone, iPad, and iPod touch - Apple Support

Also:

The All Too Common SAD Reality of Buying a Used iPad/iPhone

~Katana-San~

Hello ~ We can’t and Apple will not. There is a very good chance you purchased a stolen iPhone as well. Your only recourse is to get your money back from the shop you bought it from otherwise you made a costly mistake. Sorry:(

~Katana-San~

Why is the owner of the device not in possession of it? Only the owner can unlock it with their Apple ID credentials.