Reciting another Surah after Surah Al-Fatihah in supererogatory Prayers
It is an act of Sunnah to
offer Du‘a’-ul-Istiftah after saying Takbirat-ul-Iharam ("Allahu Akbar [Allah is the Greatest]" upon starting Prayer) in Salah Al-Nafilah and Salah Al-Fard. Likewise, it is an act of Sunnah (whatever is reported from the Prophet)
to recite a Surah or some verses of the Qur'an after Al-Fatihah in Salah Al-Nafilah. If a person abandons any of this, they do not have to make up for it.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.