As others have said, Jellyfin is not the correct tool for this job right now. One of the things that should come out as a result of the EFCore database migration is new library types. One of those being podcasts. The old database made it incredibly difficult to add a new media type so that roadblock is gone now. So possibly soon™.

I would treat these like podcasts and use ABS to play them. Or any other podcast app. Keep in mind that ABS is heavily geared towards audiobooks and the web interface. Everything outside of that (native apps and podcasts) is not a major priority for new features from the current set of devs. Which isn't a bad thing! Podcasts plenty well enough to be useful.

I normally love opinionated software, but Jellyfin's options often just kind of suck.

It would be nice to have an option to mark a folder as "Just list these in alphanumeric order, and play them when I click on them".

But I'm not aware of such an option.

You might need something like AudioBookShelf for these to play them properly.