This isn't really the usecase, you'd be better off just playing it with VLC from a BD/DVD drive with the menu plugins. Netflix won't have DVD menus either. Ripping is necessary for this to make your physical copies accessible via Jellyfin. May want to check ARM (Automatic Ripping Machine) to streamline the process. Legally, this is perfectly fine in most jurisdictions, because you are creating a backup of your purchased property.

Even with all the right hardware and community-recommended open source software, there are still plenty of unique hostile choices made in BluRay publishing that means playing my stuff in realtime from the disc before ripping has about a 75% success rate. Many of them scramble playlists and bend the standard to make it unplayable without using their official license.

And that’s if you know where to get the legally grey key files to decrypt them in the first place.

DVDs should be possible in this day and age though.

unless you rip the movie out into a single file first

I don't see the problem with that. It's what I've done with every single disk I own. Why would I bother with badly-written menus, pointless extra content and tons of ads and copyright warnings I need to sit through before I can watch what I paid for?

Interactive media like menus is a nightmare to support. Kodi has some support but only on pc. Also to your last sentence it’s a grey area, if you rip the disk to any format you’re essentially violating copyright because making a copy requires circumventing encryption, which violates the dmca (assuming USA). Might as well just use makemkv then, unless you’re real serious about archiving literally everything