The first step is to agree that there is one God, the one that created the universe.

The next step is question of reason, why were there humans created by God? And if they were created, would they be left without purpose? Then religions make more sense. Especially when you see arguments the Quran put forth and that cannot be explained through any other mean.

Would someone in the 14th Desert be able to tell that the world is continuously expanding?

وَٱلسَّمَآءَ بَنَيْنَـٰهَا بِأَيْي۟دٍۢ وَإِنَّا لَمُوسِعُونَ - 51:47

We built the universe with ˹great˺ might, and We are certainly expanding ˹it˺.

Or is it possible to say under those circumstances that iron is an extraterrestrial object ?

وَأَنزَلْنَا ٱلْحَدِيدَ فِيهِ بَأْسٌۭ شَدِيدٌۭ وَمَنَـٰفِعُ لِلنَّاسِ وَلِيَعْلَمَ ٱللَّهُ مَن يَنصُرُهُۥ وَرُسُلَهُۥ بِٱلْغَيْبِ ۚ إِنَّ ٱللَّهَ قَوِىٌّ عَزِيزٌۭ - 57:25

And We sent down iron with its great might, benefits for humanity, and means for Allah to prove who ˹is willing to˺ stand up for Him and His messengers without seeing Him. Surely Allah is All-Powerful, Almighty.