First off, I'm a Christian not muslim. Ok.
Now, I've been thinking how to solve the Omnipotence of God vs The Free will of Creation. And I've come up with a solution. One, that we need to redefine what we call Omnipotence. Take note of the exact words I use in defining it. God Omnipotence is defined as God having Possession of all "possible" realities which include the exact realities.
From this point, God' Knowledge is timeless and Non-linear. God then use His Omnisapience to determine what is most "likely" to occur from His Omniscience. Take God' Omniscience like A Machine where One can see all "possible" reality. As God is looking or watching at the machine, God uses His Omnisapience (Infinite Wisdom) to determine what will most "likely" occur.
I was still studying this that I asked myself a question. If this is How God Omniscience really is, then How can He decree a future? How can He be exactly sure of the future and then still let His Creation have free will? Well, I have an answer to that also.
From God' Omniscience which is the Knowledge of all possible reality, when God decree a Future, all reality that won't lead to that future event will be cancelled i.e. cease existing. But there will still be a lot of possible realities for God' Creation to be able to exercise their free will which will lead to that future event. Although God' Creation "might" not be able to exercise their complete free will, there free will won't be totally cut off.
Imagine you're playing the game "who wants to be a millionaire". You are asked a question and then there are four options to choose from, now you know you have the choice or free will to choose any of the four options they give you. Now, imagine you don't know the answer to the question and there's something you can click that will eliminate two options from the four options to pick. Now, you know you have the free will to choose from the four options they give you before but now, even though you initially had four options, now you have the free choice to pick from two options because the two other options have been eliminated. Now, you know that even if you can only choose two options, that does not mean your free will have been eliminated. It only means your free will have been limited to two choices. That's the same with the other possible realities that will lead to God decreed future. Even if there are some realities that have been cut off, there are still other possible realities to allow God' Creation to exercise their free will. Their free will have not been eliminated but have been limited. Thanks for reading. I hope and pray you got my point. There might be other alternative answers that might be better than this answer but at least this answer deserves a merit.