All the miracle given to the Prophets by Allah (swt) before the Holy Prophet (saww) was only influential at the time when that particular Prophet was alive for example today the staff of Prophet Musa (a.s) is not having any influence or role same way the power of curing and giving life to a dead person by Prophet Isa (a.s) but the Holy Quran is remained same as it was a challenging for Human at the time of Holy Prophet (saww) in Arabia and other nation. Even today no one can have power to challenge any single verse from the Quran and say that it is not correct etc. What few say about Quranic verses and it’s authenticity is because of their ignorance or hatred otherwise Islamic scholars have given answer to all of their objections nicely.
Also don’t think that what other Prophet had power and miracle Holy Prophet Muhammad (saww) didn’t have. No he has all of them too and history shows that he showed many of them but because the Religion of Islam is the final and Only Religion bear Allah and will remain till Doomsday it’s miracle is also will remain till the end of the day.

إِنَّ الدِّينَ عِندَ اللَّهِ الْإِسْلَامُ
Surely the (true) religion with Allah is Islam…..(Ale Imran/19)