In the Holy Quran, God states: “messengers to every people“ (10:48) and “We raised among every people a messenger“ (16:37).
Prophet Muhammad further declared that God has sent no less than 124,000 prophets to mankind throughout history (Ibn Hanbal, Musnad, 5, 169).
Some people make a case where if it does not state in the Quran, it doesn't exist which is false because in the Holy Quran, it state “And We sent some Messengers whom We have already mentioned to thee and some Messengers whom We have not mentioned to thee...“ (4:165). Thus, to declare that Lord Krishna is not a prophet simply because the Quran does not mention him is a meritless argument.
Prophet Muhammad declared, “There was a prophet of God in India who is dark in color and his name was Kahan [Krishna]” (History of Hamadan Dailmi Chapter Al-Kaaf). Some critics allege this is not a Sahih (authentic) hadith, and while their assessment could be valid, their conclusion that the hadith should be discarded is invalid. Basic Islamic jurisprudence holds that if a hadith does not contradict the Quran, then it may be accepted as valid. As mentioned earlier, nothing in the Quran, Sunnah or Hadith declare that Lord Krishna was not a prophet of God. Thus, Prophet Muhammad’s testimony provides clear guidance of Lord Krishna’s status in Islam —
Even in Hinduism Krishna says in the Bhavisyath Purana 3:5-8 states, “A spiritual reformer will come from a foreign land (outside Bharat) with his disciples. His name will be Mahamad. He will dwell in a desert.” Likewise, “His [Mahamad’s] followers will perform circumcision. They will not keep their hair in the form of Choti as the Brahmans do. They will keep beard. They will bring about a revolution. They will call with a loud voice [i.e. Adhaan]. They will eat meat of animals other than that of swine. They will attain purity through Jihad. Their civilization will be called Muslay [Muslim].” Here Krishna prophesies the coming of The Holy Prophet.
There are many more examples or this if you just do ipenough research