I don’t think it’s possible.
Do you know what SponsorBlock is? It's a thing that crowdsources identifying the embedded ads in Youtube videos and manually marking them to be skipped over.
The solutions I found are literally "SponsorBlock, but for podcasts" -- either by using Youtube Sponsorblock to remove the embedded ads from the Youtube copy of the podcast and then repackaging it in an RSS feed for your podcast app to download, or by forking SponsorBlock and running it against Spotify instead of Youtube.
| potential solution | why I rejected it |
|---|---|
| Pinchflat+Sponsorblock (https://lemmy.world/post/30510539) | requries a selfhosted service separate from the podcast app |
| https://github.com/ericmedina024/podcast-sponsor-block | requries a selfhosted service separate from the podcast app |
| https://spotsponsorblock.org/about/ | browser extension for use with spotify.com, not an app |
Basically, I'm holding out until I can get Sponsorblock integrated directly into AntennaPod (or some other podcast app available from F-Droid).