4 Rak’at before the ‘Asr Prayer

The 4 Rak’ahs are of less reward and significance in the importance of adhering to them compared to the “Sunan al-rawatib”

The 4 Sunnah of Asr are Ghair Muakkada and it’s proven from the Sunnah of the Messenger of Allah

Ibn ‘Umar (May Allah be pleased with them) reported:
The Prophet ﷺ said, “May Allah have mercy on a man who performs four Rak’ah before the ‘Asr prayer.”

Riyad as-Salihin 1120