Tellin my daughter about her dad

At 2 months pregnant I found out the father of my child was cheating on me. It was something I looked past until it became repetitive and saw more and more toxic traits. He doesn’t wanna be in her life either. She is now 10 months old. Me and my friend recently got married when she was 6 months old and I do want her to grow up and know the situation but obviously age appropriate. She can’t quiet talk yet but I want it to be something discussed before she picks up on the concept of everyone has a mommy and daddy. And chances are she looks like them. Her biological father is Asian and her step dad is Mexican. So I wanted to try and look for a kids book that explains something similar? Very specific and probably not out there yet but does anyone have any recommendations? Or go through a smiling experience? How did you explain to your children their “dad” isn’t actually biological father ?