Can the Sunnahs of the Messenger, may God's prayers and peace be upon him, be mentioned in the Qur'an, and God has uniquely granted our master Muhammad, may God's prayers and peace be upon him, their understanding?

It is not unlikely that many of the Sunnah (definition) of the Messenger, peace and blessings be upon him, were derived from the Qur’an, as Al-Shafi’i said. However, this does not mean that all of his actions are found in the Qur’an. It has been established that the Sunnah was revealed to him and is not part of the Qur’an, such as the hadith (definition) of Abu Hurairah concerning the man who sells food. Many unseen matters, such as the details of the Signs of the Hour, Paradise, and Hell, along with the Dajjal, were conveyed by the Prophet, peace and blessings be upon him, and are not detailed in the Qur’an. Thus, the Sunnah is a revelation just like the Qur’an, and not merely an understanding of the Qur’an. The Sunnah descends through revelation just as the Qur’an descends.