Poetry has said they won’t support this PEP, both from a standardization and export viewpoint.
Not supporting sdists, source trees, and VCSs is one sticking point. The other is the per-file dependencies which was added to the PEP after Donald provided direct feedback on that very topic.
I have recorded this feedback in PEP 665: record Poetry's views on the PEP · python/peps@6bbde29 · GitHub .