Gotta be found family movies, particularly if the parental figure didn't want the responsibility in the first place or if they're clueless, gruff, and/or emotionally not prepared for a child.

So movies like Logan, Ice Age, Wild Robot, Up, or Despicable Me and shows like The Last of Us, The Mandalorian, Game of Thrones (Arya and the Hound), and The Witcher.

I was trying to think of more found family mother shows and movies and honestly couldn't think of more. Most of the ones involving women that I could find are of friend groups or there was no hesitation to pretty much adopt the child.