Not sure if anyone can answer this, but hopefully an Apple developer sees this topic.
The new Enterprise Partner Feed EPF full dump folders are missing some files.
eg. https://feeds.itunes.apple.com/feeds/epf/v5/20220101/itunes20220101/ is missing the song.tbz file which is usually ~10GB.
The new folder https://feeds.itunes.apple.com/feeds/epf/v5/20220108/itunes20220108/ does have a song.tbz file, but is missing the collection.tbz and also collection_song.tbz files.