That’s why I’m saying what I meant. Sorry for not remembering the official terminology in this instance
Plus the affected not-displayed genres don’t have to come from files. They can be added in the Roon editor as well (though yes they still appear in the “file” row in the editor IIRC)
Custom genre is different from file and from Roon. “File” comes from your local file metadata. “Roon” is automatically populated from Roon metatdata. “Custom” is any additional genre that a user adds to the artist and/or album.