I use Fenix 7 Pro and am trying to listen audiobook. I use open (non-DRM-protected) book in MP4 (m4b) format. The file is from credible, commercial service purchased as non-DRM, so I strongly believe that the file format is okay.
Garmin is able to read and play it but as a single file. I don't even see any chapter-related controls in the Garmin UI. It's just "30 seconds backward/forward" and "back to start" in the player. I tried to open the file using AudioBooksConvertrer https://github.com/yermak/AudioBookConverter and I see that the file does have parts and chapters as expected.
Any experience/insights about the issue? Anybody was able to use chapters in a single m4b file? Maybe chapters should have some specific format or pattern?
