Does creation itself know it was cursed and that the curse will one day be lifted?
Yes. According to Romans 8:20-21, all of creation is aware that it was subjected to the curse, and it also knows that the day is coming when that curse will be lifted. Scripture states this, and Paul writes it by inspiration.
Les teaches that when the curse fell, the present-day ecology was established, with one species feeding on another—a result of the curse, not God's original creation. He directs us to Romans 8, where all creation is aware it was subjected to the curse but also knows the day is coming when the curse will be lifted. Paul writes this by inspiration, and God provided a remedy through the Redeemer, the Son, the seed of the woman.
For the creature was made subject to vanity, not willingly, but by reason of him who hath subjected the same in hope,
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