Same Parents but Our Kids Look Completely Different

I’m mixed. My mom is black and my dad is white. My husband is white. Our first daughter looks exactly like me but her skin is slightly lighter than mine. A soft caramel color. Her hair is like mine (4c) but slightly softer. Our youngest, looks completely different! She doesn’t look like me or my husband. She looks like a 100% white child. Very light skin complexion and has 100% white hair texture. I’m afraid when my daughters get older and go to school, that they’re going to be told that they’re not sisters and people are going to assume that they have different dads 😕 I already had a few moments where people assumed that my youngest wasn’t mine and I was her babysitter or something. I’m just really sad to think about what my daughters might face as they get older 😔 Does anyone else relate to this? I love my daughters so much and I love the uniqueness and differences they have ❤️