not a mobile app but Spicetify for desktop might have an extension that does what you’re looking for.

I just did a full wipe of my system to try out Fedora KDE, XFCE & Budgie spins (I finally got fed up with Gnome not being what I wanted anymore after like 15 years of using it as my preferred DE) and didn’t really have the same experience at all - even Fedora XFCE which you say was completely broken was working fine for me. I haven’t run anything other than Fedora in a long time though so I can’t really speak to the out of the box experience on other distros.

music discovery/discussion. I found so much cool music on reddit communities for bands or genres I like

resources for learning about & discussing some of my hobbies and interests like FOSS software, Linux, gaming, guitar etc

communities for people local to the city/state I live in