Quite upset because the only way I could find to scrobble listens from iOS to ListenBrainz was to buy a third-party app (Marvis Pro - €10) and then scrobbling to… Last.fm!
Then, using a Python tool, I synced the listens to the ListenBrainz account. It runs on crontab on my Raspberry.
Darn it, Apple. Why make things so complicated?