The argument is that the hadith of one who prays two rak’ahs after Fajr is weak

Translation

This book deals with the investigation of weak and fabricated hadiths related to the hadith “Whoever prays two rak’ahs after Fajr will have the reward of Umrah and Hajj,” where the author Ahmed Shehata Al-Iskandari explains the methods of narrating the hadith and the chains of transmission of its narrators, and reviews the reasons for each method and its narrator, confirming the weakness of the hadith and explaining the reasons for its weakness. The book is a type of book that is concerned with the science of reasons in hadith and falls under the classification of reasons and questions.