How do I bypass iPhone locked to owner?

There is no “bypass.”

Without the cooperation of still-registered owner(s) of the phone(s), it(they) will remain unusable.

See an outline of what needs to occur in this article:

How to remove Activation Lock - Apple Support

You don't bypass the anti-theft lock.

If this is a second-hand iPhone, see:

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