According to parents.com The only child has trouble sharing, the oldest is bossy, the baby always gets what he wants, and the middle child is—well, stuck in the middle. Are these merely stereotypes, or is there some truth to birth order differences?
Misha & Simone look at this from the lens of their own sibling relationship to help to bring context to a widely viewed stereotypes. https://www.parents.com/baby/development/sibling-issues/how-birth-order-shapes-personality/