I don't see the poem, but I will tell you how a poet creates irony in a poem.
The form of Irony in poetry is a literary method that uses differing, oddity, or a form of a nieve speaker to say something other than a poem's accurate meaning. There are three basic and most well-known/ communicated types of irony used in poetry. These forms being verbal irony, situational irony, and dramatic irony.