You are not eligible. Your current work permit doesn't expire until next year. There is no point applying unless IRCC extends the public policy into 2024.
I consulted several law firms, and they unanimously agreed that according to the guidelines, this situation is permissible. It's clearly stated that everything depends on the Original work permit. My lawyer told me that most of the cases she handles are waiting for results, and a few have already been approved and granted an 18-month PGWP. I don’t understand why you keep emphasizing that it's not possible when the guidelines clearly state that it depends on your original PGWP.