I would like to share a reasoning.
We consider that an Engineer, before starting to build his project, draws up a construction plan. In the case of a Deity that promises eternal life in paradise, we can consider that the time of this universe will be infinite, since they will live forever.
Therefore, it seems to me more plausible that we are still in the blueprint of the project, that is, within the thought of this divinity, than that we were actually created. Because the deity would still be processing such endless time.
That is, If God designed an infinite paradise, whether of space and time, he is still designing it and we were not created yet.
Both infinite paradise and infinite living would require infinite time.
However, reading about the subject in the meantime, infinite or eternal, implies that there was no beginning and no end, it always existed, in the perhaps literal sense. It also depends on the interpretation, because infinity can also have a beginning, like things that begin and have no end.
There are infinities different from other infinities.
But, yes, it would be as if God were still building (Mentally) his plan of creation, considering the infinite time. Now since he would plan everything before building, and for infinity, we would still be in his mind, for not having finished his plan.
Unless he, as creator, just created the rules of the universe, how to formulate an equation of everything, put the ingredients together and did it. But then I question the authenticity of my free will, now I would only be obeying a formula.