Help deleting an old post

I need ideas or help trying to delete a post that appears on Lemmy.ca. Some background info: I made the post in early 2025 with my lemm.ee username. The post was created on Lemmy.one. Now the post only appears on Lemmy.ca. I would delete it myself but lemm.ee was deleted and I cannot login with my old username & password. Any help is appreciated.