I do use Lidarr! It pulls from the MusicBrainz database, so you can only really search and add tracks that were released as a single. My use-case is to download albums and monitor new releases from my favourite artists, and it does a good job at that. I use https://github.com/JagandeepBrar/lunasea on my phone to add stuff to Lidarr, Sonarr, and Radarr.
ViMusic and InnerTune are both clients for YouTube music on Android. I prefer Innertune’s interface, but it seems like ViMusic might have an import feature? Personally I stream my music collection from my Jellyfin server with Finamp.
I do use Lidarr! It pulls from the MusicBrainz database, so you can only really search and add tracks that were released as a single. My use-case is to download albums and monitor new releases from my favourite artists, and it does a good job at that. I use https://github.com/JagandeepBrar/lunasea on my phone to add stuff to Lidarr, Sonarr, and Radarr.