Allah's perfect attributes are eternal: they do not begin with the creation of the world. He possessed the attributes of creating and providing before creatures came into existence.
The eternity of an attribute differs from its temporal relation to a particular creature. A person comes into existence or receives provision at a specific time, yet no new perfection thereby arises in Allah's attribute.
Knowledge, power, and will likewise do not depend on the existence of creation. To imagine an earlier deficiency followed by an increase in perfection would contradict the eternity of His attributes.