The Quran says it is fully detailed and left nothing out:
6:114 Say, “Shall I seek for Judge and Ruler someone other than God? He is the One Who has revealed this Book, well expounded in detail for you.” Those whom We have given the Book know that this is revealed in truth from your Lord. Be not among those who argue for the sake of argument.
6:115 Perfected is the Word of your Lord in truth and justice. None can change His Words. He is the Profound Hearer, the Knower. [6:34, 6:115, 10:64, 17:77, 18:27, 33:38, 33:62, 40:85, 48:23]
6:38 (There are signs in the Universe to behold.) There is not an animal on the earth, nor a flying creature flying on two wings, but they are communities like you. We have omitted nothing in the Book (that was essential to be given through revelation.) Then to their Lord they will be gathered.
How then do you say that he had other revelation that was not in the Quran and he taught us things not recorded in the Quran but need to be done 5 times a day, 24/7?