The book of the Apocalypse is not poetic language - that’s in the Song of Songs.
The book of the Apocalypse is in the vein of other apocalyptic writing - most notably Daniel and a few verses in Matthew, but then also Jeremiah, Hosea, etc.
It uses dramatic imagery of cataclysmic disruptions to describe changes within the human political sphere - like Isaiah 30:26 promises that “the light of the moon will be as the light of the sun, and the light of the sun will be sevenfold, as the light of seven days, in the day when the Lord binds up the hurt of His people and heals the wounds inflicted by His bloe”
notice how the number Seven is used symbolically?
we notice this again in Isaiah 60:19-20 “Your sun shall no more go down, nor your moon withdraw itself”
So to sum up - not poetry, rather part of apocalyptic literature is the vision of John of Patmos.
It s also the only book of the Bible that promises a blessing to those who read it. It is not u knowable and fits exactly with the OT prophets major and minor. Our God is wonderful and tells us the end from the beginning