Jonty loh-e-mehfooz is like a tablet above the first heaven I believe, you could say a book even, where everything that happened, is happening and will happen is written. Basically the whole fate of the creation. They say it is of a normal size but still holds that much info, best example would be DNA or a hard drive. Qur'an is actually a small portion out of it, hence imagine loh-e-mehfooz's stature in the universe or the whole creation.
So when I mentioned it, I meant maybe a different version of a qur'an, or just a book with some other name, that comprises of different verses to ours, could have been sent to people on other planets that suit their environment, nature, life etc. to give them their share of guidance through their own prophets. And that means perhaps we are the most lucky ones to have Muhammed come to us. Or maybe he did pay visit to them during his Miraj, and could even have spent years there teaching them, while it counted only as one night on earth. Countless possibilities, thus fascinating.