It seems to me that only a little while ago there was some debate over whether there was any Islamic SF about, and if not why not. From memory (I can't remember now where I came across that discussion) the debate was centred around the science in SF.
However, Canadian writer, Ahmed A. Khan, is looking at the question from the point of view of Islamic SF being any SF that reflects, in a positive way, the values and teachings of Islam.
You are free to agree or disagree with him, since according to his article he is trying mainly just to raise discussion. One tricky point is that many of the values of Islam are shared by other religions, and even atheists, so is it valid to label such stories as Christian or Islamic SF? However, he does also suggest some books to read if you're curious about what Islamic SF is.