Why isn't my podcast episode appearing on Spotify after 24 hours?

Spotify says a new episode or update can take up to 24 hours to show up, so 24 hours isn't automatically a failure. Once you're past that, I'd first check that the episode is actually published at your host (not scheduled or saved) and that the public RSS feed shows the episode, audio enclosure, title, and date. If you host with Spotify for Creators, published episodes go to Spotify automatically; if you host somewhere else, make sure the show was submitted or claimed with the right RSS feed. Don't keep deleting and reposting it while you troubleshoot, since that can make the feed harder to compare. If the public feed is right and it still isn't on Spotify after another reasonable refresh window, contact your host or Spotify support with the show and episode links.