I didn’t recite a Surah after Surah Fathiha in my Sunnah Prayers

Question
assalamualaikum wa rahmatullahi wabarakatuhu.
i have only just learnt that after the al-fatehah, a protion of the quran must be recited for the third and forth rakah in sunnah prayer.
please can you inform me what i must do? do i have to pray all the sunnah namaz again that i have potentially prayed incorrectly?
jazakallahu khairan wa ahsanal jazaa

Answer
In the name of Allah, Most Gracious, Most Merciful
As-salaamu ‘alaykum wa-rahmatullaahi wa-barakaatuh
There is no Qadha for the Sunnah Salah except for the Sunnah of Fajr, when it is missed together with the Fardh of Fajr. The Sunnah of Fajr can be performed from the time of Ishraq (approximately 15 minutes after the Sunrise) to midday (approximately 10 minutes before the time of Zuhr begins). After midday, there is no Qadha of the sunnah of Fajr.
In the enquired situation, make Taubah and Istigfaar for not performing your Sunnah Salah correctly and in future ensure to perform your Sunnah Salah correctly.
And Allaah Ta’aala Knows Best.

Akhyar Uddin
Student, Darul Iftaa
Buffalo, New York, USA
Checked and approved by
Mufti Ebrahim Desai.