In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
In this fatwa:
Responding to your question, The Standing Committee for Islamic Research and Ifta’ states:
What is prescribed in Fajr prayer is to make the recitation lengthy, and to recite whatever one can of Quran after Al-Fatihah, without singling out a particular surah, except in cases where a particular surah has been mentioned in reports, such as Surat As-Sajdah and Surat Al-Insan in Fajr prayer on Fridays, because singling out a surah without evidence to that effect comes under the heading of innovation. (Fatawa al-Lajnah ad-Da’imah, 5:340)
Almighty Allah knows best.