How can one show piety to their divorced parents, especially when each of them asks him to do something different?

A Muslim must honor their parents to the best of their ability. If their rights conflict, the mother's right is more emphasized and takes precedence over the father's right, as the Prophet (peace and blessings be upon him) said: "Your mother, then your mother, then your mother, then your father." It is appropriate to combine their wishes if possible, but if not, the mother has a greater right to be honored.