We are born with sinful tendency but not sin.
We are born as one that has already sinned.
This may seem strange but to address the question, I would combine the two points above.
I believe that we are all born sinners in the sense that we inherit a sinful nature due to Adam and Eve’s disobedience in the Garden of Eden (Genesis 3). This is known as the doctrine of Original Sin.
Psalm 51:5 states, “Surely I was sinful at birth, sinful from the time my mother conceived me.”
Romans 5:12-21 explains, “Therefore, just as through one man sin entered the world, and death through sin, and thus death spread to all men, because all sinned.”
However, it is important to clarify that an infant, having not yet made any personal choices, cannot be held accountable for personal sin. It would be strange to me if anyone tried to refute this. However, they are considered to have inherited the sinful nature, which is beyond their control. No human, except for Christ, has ever lived without sin. Inevitably, the infant will grow up and commit sins, as it is in human nature.