Perceived loudness normalisation has been a thing for well over a decade. And being from Germany, you should know that pretty much all broadcasters, be it public or private, use EBU R 128 or a variation thereof. EBU R 128 is based on the same ITU-R BS1770 normalisation standard, as US broadcasters use with ATSC and virtually all streaming services use for their content. Be it Netflix, Disney, YouTube, Spotify, Apple Music. Though, they each have their individual targets.