Metapoems are almost as alluring as metafiction. Perhaps even more, considering that poetry is said to be the purest of all art-forms.

https://www.poetryfoundation.org/poems/50986/paradoxes-and-oxymorons

pexels-photo-561084[1].jpeg“I think you exist only
To tease me into doing it, on your level, and then you aren’t there
Or have adopted a different attitude. And the poem
Has set me softly down beside you. The poem is you.”
John Ashbery, Paradoxes and Oxymorons

Novels too.