Has it been reported that the Prophet (peace be upon him) foretold the fall of Turkey from Muslim hands, then its recovery at the End of Times?

The Hadiths regarding the conquest of Constantinople are divided into three categories:

The first category: Authentic Hadiths that mention the conquest of Constantinople will occur at the end of time, preceded by a major battle between Muslims and the Byzantines (Romans), and immediately followed by the appearance of the Dajjal (Antichrist) and the descent of Jesus, peace be upon him.

The second category: Hadiths with slight weakness, some of which speak of the conquest of Constantinople preceding that of Rome, some praise the commander and army of the conquest, some link the prosperity of Jerusalem with the ruin of Yathrib (Medina), the eruption of the great battle (malhamah), the conquest of Constantinople, and the emergence of the Dajjal, and some specify the period between the great battle, the conquest of Constantinople, and the appearance of the Dajjal as seven months.

The third category: Fabricated or extremely weak Hadiths, such as the Hadith (definition) about the conquest of Constantinople through tasbeeh (glorification of Allah) and takbeer (exaltation of Allah).

In summary, the authentic Hadiths indicate a specific conquest of Constantinople at the end of time, followed by the appearance of the Dajjal. This is among the matters of the unseen, the details of which cannot be definitively ascertained.