Proof from morality

Hello Rabbi,
In the fourth notebook, you demonstrated at length the evidence for the existence of the Creator from the fact that we have objective morality to which we compare the morality we experience ourselves.
I didn’t understand why, if everyone has a different morality, if there is one objective and binding morality that God created, there should be a situation where everyone agrees clearly and unambiguously on what is moral and what is not. And as we know, that is not the case.
I would appreciate your response, thank you very much!