Already answered in my reply to him through various topics on these forums. Start with this simple question.
Step 1: When you win a prize, are you rewarded when you meet the judges to receive it and your name mentioned as the winner or is it 2-4k years later after you won?
After you’ve thought about it, how does each scenario work in the heavenly scene? If Christ won and was waiting there all this time, why didn’t John see him when he viewed the angels, the 24 elders, the 4 living beasts, God on the throne, the crystal sea etc. Where was Jesus?
If Jesus was not waiting, but just appeared as he ascended to Heaven, how does that fit the scene. As a lamb that had been slain.
Some of these things can be explained in scripture. The point is, when questions arise that cannot be explained, there’s a problem with their theory.
Here’s another. In Ch. 4, why are the 7 lamp stands (the 7 churches) the 7 spirits of God yet in Ch. 5 after Jesus enters, the 7 spirits are his through God. That can only happen if there is a new testator demonstrating the mosaic covenant in Ch.4 from Christ in Ch. 5. To John which was a past event. To explain future things, past events are needed to explain why, how, where or what. You cannot explain the seals without explanation of the scroll, who could open it, the prerequisites to opening it, who originally held it etc.