Apparently I was wrong about how podcast chapters are embedded: It's not in the RSS feed itself but encoded as ID3v2 tags in the MP3 file. Apple Podcasts added

Apparently I was wrong about how podcast chapters are embedded: It's not in the RSS feed itself but encoded as ID3v2 tags in the MP3 file. Apple Podcasts added support in iOS 12, here's a Google Sheet of the rest: https://docs.google.com/spreadsheets/d/1c2L14UVH1xtN4iDG4awheLbMgPCQgaKEamUauWs1gps/edit#gid=0 https://docs.google.com/spreadsheets/d/1c2L14UVH1xtN4iDG4awh...