There were many Gospels, too, in the early centuries of the Church. Only Church establishment approved Gospels made it into the Bible.
Yes, but those materials never made into the Bible that we know today in the first place, and I’m not aware if the church leaders ordered them to be destroyed (hidden, perhaps). The Bible is like an edited book with God as the editor (through the Church Fathers), so no doubt that there are many ‘gospels’ didn’t make to the book, and Christians know this. Muslims believe that the Koran was given to Muhammad in the Nuzulul Quran night as a complete book. So, IMO, Christians shouldn’t be surprised nor confused if there are other materials that are similar to the Bible. That’s not the case with Muslims and Koran.
“Only Church establishment approved Gospels made it into the Bible.”
Yes, but for very sound and strict reasons, which are still defensible to this day, if we were just starting the same project.
Correct.
And that is because the Bible is the inspired word of God. God did not whisper each word of the Bible into the ears of the people who wrote the Bible. Rather, the Bible is a collection of works that were written under the inspiration of God's Holy Spirit. How do we know this? Because a number of people have discerned God's Spirit within the writings that are now the Bible. Those same people did not discern God's Spirit in the books that were left out of the Bible.
Muslims, on the other hand, believe that the Koran is the literal word of God. They believe that the Arcangel Gabrielt dictate word for word every word in the Koran, and that the words in the Koran are Allah's very words. They believe, moreover, that Gabriel spoke to Mohammed in Arabic, and that therefore the only true Koran is written in Arabic.
Were it to be discovered that the text of the Koran preceded the life of Mohammed, it would undermine a baci belief of Islam.