Leave aside this for a moment.
What is your position on creativity? Specifically in this case human creativity. How is that at one point in the past a thought, or piece of knowledge, or piece of information was not around, but now is around? For example a child doesnt contain the thoughts and experience that it will have when it is an adult. Surely its the case that these things are newly created?
That doesn’t mean we don’t have free will.
You can show that a decision has already been made before it enters consciousness, say if I pick up a pen, before I think “Im going to pick up this pen” motor neurons have already lit up etc. before the thought, yes, sure. But that doesn’t tell us anything. It may be the case that our consciousness is the product of such decisions rather than the cause of them, or it may be that the conciousness is the decider of whether to go through with the decision (the same brain activity can show in people who have not picked up the pen). Either way, the decision - wherever it originated - has still been made, whether it is a concious decision has no bearing on whether it’s a “free” decision.
Besides, I would say that most actions we partake in don’t enter our consciousness anyway.