I have the iPhone 11 and I’m here to ask why I don’t have enough storage

I have the iphone 11 and i’m here to ask why i don’t have enough storage i have google photos and i have about 70 photos in my camera roll. My sister has the iphone 7 plus and she has about 2,000 photos in her camera roll and somehow i don’t have enough storage. I am really confused

[Re-Titled by Moderator]