Habe ich nur auf Englisch gefunden:
„Asalamu Alaikum Warina
Hope you are doing well. May Allah Almighty reward you for sending your question. Indeed, it is always good to hear from our brothers and sisters and be able to provide them with information that can help them better understand their religion.
Muslims believe that the divinity of the Quran and its authenticity is an issue beyond any doubt, as it has been proven through many textual and intellectual evidences, something that no other book can claim.
This is not only because it is a miraculous book, but also because it was revealed as the final and everlasting source of guidance for all humankind till the day of Judgment.
Every letter and word in the Quran has been handed down to us through generations and centuries in the absolute same form in which it was revealed.
Yet, the question you raised regarding the names of the surahs (chapters) of the Quran is valid: Were the surahs given their names during the time of the Prophet (PBUH), or were they given their names later on?
The majority of Muslim scholars agree that the names of the surahs were based on revelation. This means that it is either that Almighty Allah sent Gabriel down with the names of the surahs to the Prophet (PBUH), who told the Companions about them. Or the Prophet himself was guided to name them, and then revelation came in support of the name chosen.“
https://aboutislam.net/counseling/ask-about-islam/quran-chapters-divinely-revealed-names/
Auf der Seite gibt es noch Hadithe
Hier kurz auf Deutsch, so wie ich es verstanden habe:
Entweder Mohammed hat per Offenbarungen durch einen Engel die Namen gesagt bekommen oder Mohammed wurde durch Gott zu den Namen geführt.