QUESTION: Does 2 Cor. 5:10 apply to saved and unsaved alike?
ANSWER: All, both saved and unsaved, must appear before the judgment seat of Christ, for He is the appointed Judge. (John 5:22, 27; Acts 17:31; Rom. 14:10-12; 2 Tim. 4:1.) But all will not appear at the same time, nor for the same purpose.
The "resurrection of life" (John 5:29) or first resurrection (Rev. 20:5), includes all the heavenly saints who have been raised or changed and who are there in bodies of glory, like Christ's body of glory (Phil. 3:21). These are manifested before the judgment seat of Christ, to see what grace has done for them, and to receive tokens of Christ's approval or disapproval of their ways.
When the unsaved dead at the resurrection of judgment (John 5:29) shall stand at the judgment seat, it is called the Great White Throne. There they receive their sentences for their sins and are cast into the lake of fire (Rev. 20).
In Matt. 25:31-46 we get some of the people of the nations living on the earth who took part in helping or persecuting the godly Jews in the time of their tribulation. These are brought before the King who has come in His glory. He divides them: those on the left hand are sent into eternal punishment and those on the right go into eternal life in the Kingdom on earth.
In 2 Tim. 4:1 Christ is the Judge all the way through.