To Muhammad peace be upon him, the Holy Quran was given as an eternal and great miracle. Because his prophecy will last for all the peoples, places and times until the Judgment Day. That is why the Quran is given as a fundamental miracle, spiritual and immortal miracle, not a material.
Even after his death, his miracle - the Quran, will be alive until the Judgment Day. That is why when the polytheists and disbelievers ask for a miracle confirming his prophethood, they came across the Quran.
Great miracles to the other prophets were simple matters for Muhammad peace be upon him. Similar to the miracles given to almost all the prophets, the Prophet Muhammad peace be upon him also took place in them. There are accounts of this in the hadith books. But since these things became more common and repeated, there was no major uproar.