The documentary pretty much confirms she's part of a Bonapartist counter-gang.
Basically, the music industry has been going through crisis since the mid 2000s. Big Tech has tried to take over the entire music industry as a means of stabilizing the crisis. They're doing this by ensuring streaming services become the dominant medium, and in order to "sell" streaming to the broader music industry they used Billie as their figurehead.
Billie was "discovered" in 2015 by her brother's manager who had ties to Interscope Records. He got her signed to Platoon, an artist development company which was created by the co-creator of iTunes. Soon after being "planted" by Platoon she was signed to Interscope and received a ton of promotion from Apple, to which Platoon was affiliated (it's now owned by Apple). It was due to this massive amount of promotion via Apple that Billie became an enormously successful pop star.
Platoon functions very similar to a label except for one thing: it allows artists to keep their masters. The reason why this is highly significant is because streaming services need to have labels license artists' music in order to host them on their sites. If the artist owns the masters, they can give their music to the streaming platforms without needing to go through a middle man, and because streaming has become the main form of music consumption, artists will be very willing to hand their music over for that exposure/distribution. The future Apple and Spotify see are Big Tech agencies like Platoon taking over artists from labels and prioritizing them on streaming playlists (since these agencies are all affiliated with streaming platforms). It's all about monopolizing the industry against the major labels.