https://tentmaker.org/FAQ/23.html
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Question:
Does this mean that satan and all the fallen angels will be restored eventually?
Answer:
In the original language of Scripture, Hebrews 2:16 says, "God is not now laying hold of angels."
were is this first mentioned?
Satan and angels and those not in the first resurrection all go through the lake of fire.
Some may take longer than others, but the lake is not permanent.
Interesting in Job Satan could not test him beyond the boundaries.
Jude also refers to the angels/demons kept for judgement.
God created all through Christ, so all is in His more than capable hand.