Rev 20 applies to those who do not come under judgement. Jesus had previously taught this to the Apostle John. It was a concept already enjoyed for those who believed and had passed from death to life in the here and now. Clearly then it is a figurative concept in Rev 20 ...unless Jesus changed his mind.
Jn 5
24 I assure you, most solemnly I tell you, the person whose ears are open to My words [who listens to My message] and believes and trusts in and clings to and relies on Him Who sent Me has (possesses now) eternal life. And he does not come into judgment [does not incur sentence of judgment, will not come under condemnation], but he has already passed over out of death into life.
25 Believe Me when I assure you, most solemnly I tell you, the time is coming and is here now when the dead shall hear the voice of the Son of God and those who hear it shall live.