where does today Quran variants like khalaf, hafs, warsh, etc... come from? do they go back to the prophet(pbuh) and it's the different way the Quran was originally revealed with or they go back to Uthman(ra) Quran as Uthman(ra) burned those different variants and these different came to place where Arabic diacritical marks had to be added to the Quran?
Quran was revealed in 7 ahruf and 10 Qira'at to prophet muhammad(PBUH). THIS IS Because of the fact that different people have different ascent or dialects and different way to pronounce words. EXAMPLE: https://dictionary.cambridge.org/pronunciation/english/privacy 7 ahruf was revealed to make 7 Arab tribes -(Quraysh, Hudhayl, Tameem, Hawaazin, Thaqeef, Kinaanah and Yemen), easy to understand Quran and leave no room for doubt.