I'm in Canada, and I'm pretty locked into Facebook for a few things:
Marketplace (other buy and sell groups, finding contractors/handymen)
Events (parties and such)
Promoting my band
Group chats (Facebook is the platform that has the maximum overlap between people just being on there, not everyone has an iPhone, or is on WhatsApp, or is on discord, etc)
I've been disappointed with most sonic/Navidrome apps so I haven't gone all in with hosting my music that way. I've been sticking to mp3s
From my notes:
Most apps do not support or have a weird implementation of offline music.
Some don't allow you to swipe to go to next/previous track. Some just look ugly
You can always self host overleaf yourself