Revelation is not a chronological book from beginning to end. There are three major somewhat chronological sections from chapter 4 to chapter 18, all describing the same events from different perspectives.
The second section spans from chapter 12 to chapter 16. Here John sees the dragon waiting to devour the Christ as soon as He was born, Christ ascending into heaven, Satan being cast out of heaven because Christ is triumphant, and the wickedness of Satan’s war with those who hold the testimony of Christ; the church. Here the glorious appearing is depicted symbolically as Christ reaping the harvest and an angel reaping the grapes of wrath. He also sees the bowls of God’s judgment; seven angels standing outside the temple pouring out God’s wrath as signaled (I presume) by the trumpets blown by the angels standing before God. This section concludes the same as the first.
The third section spans chapter 17 to 18. These chapters give details concerning the trials and tribulations of the church not detailed in the two previous sections. It also details the wrath of God upon Mystery Babylon and depicts Christ’s glorious appearing as an angel coming down from heaven lighting the earth with His glory (18:1)