first of all, there appears to be a fork of Cantata (which is still my music player of choice as well) that is still getting updates (maintained by a one nullobsi), if you're on Arch, it's available on the AUR as cantata-qt6
my current fallback option for local music playback is fooyin, I don't know for certain whether it checks all of your boxes at the moment, but it is still very much in active development
I also use jellyfinmediaplayer for music on my jellyfin server, but that doesn't have lyric support (unfortunately)

There's new contender in FOSS music player scene: Fooyin

Fooyin is Foobar2000-like music player that currently hevily in development, it probably less than one year, but it has so many advance feature that even establish music player doesn't have.

it might be more complicated than you're looking for (requires a self-hosted server instead of just a desktop app), but take a look at the ecosystem surrounding Subsonic

Subsonic did some licensing shenanigans, but there's an actively-maintained GPL3 fork called airsonic-advanced

there's also alternate implementations, Gonic and Navidrome, that maintain compatibility with the original Subsonic API

because they all work with a common API, there's a variety of clients that can work with the backend.

I'm also a big fan of Beets for music organization, it's not tied in to the Subsonic ecosystem so you can use them completely separately if you want. it handles tagging, can fetch lyrics, and can also transcode the library (or an arbitrary subset of it) if you want to send it to a portable device. (not sure if this is what you mean by compatibility)

I currently have Beets organizing everything, run Navidrome on my server pointed at the Beets library directory, then Ultrasonic on my phone, and the Navidrome web interface on my desktop. the combo is especially nice for streaming to my phone - Navidrome will transcode FLAC to Opus on the fly, and Ultrasonic has an option to cache those files locally, and to pre-download them over wifi instead of mobile data. so I have my full collection available on my phone, can stream it from anywhere, and the songs I listen to frequently are already downloaded and I don't have to waste mobile data, or wait for them to load if I have poor cell signal.

Looking for something else I ended up on MusicPlayerPlus which may check lots of the boxes, especially those not covered by ncmpcpp which is my favorite mpd frontend.

https://rybczak.net/ncmpcpp/ https://github.com/doctorfree/MusicPlayerPlus

Check out MusicBee. It's my go-to for Windows now, and it has most if not all the things you asked for.

(Note: upon looking into it, MB is not OSS, if that is a deal-breaker for you)

Mpd and rmpc

Strawberry

Strawberry is a music player and music collection organizer. It is a fork of Clementine released in 2018 aimed at music collectors and audiophiles.

IIRC I was not satisfied with the UI, so it didn't become my main player. But maybe that's different for you.

What operating system do you use? On Linux I use Amarok which is great, but afaik there's no up-to-date versions of it for other operating systems. It should have everything you want dunno about some of these tho like the semicolon stuff. Strawberry is a similar player that works on other operating systems.