

That article completely practically skips over the section in the report that says that copyright can be applied by compilation to an overall work. See section II - F: “Modifying or Arranging AI-Generated Content”
Or you can also just skip to the conclusion of the actual report itself:
As described above, in many circumstances these outputs will be copyrightable in whole or in part—where AI is used as a tool, and where a human has been able to determine the expressive elements they contain. Prompts alone, however, at this stage are unlikely to satisfy those requirements.
https://www.copyright.gov/ai/Copyright-and-Artificial-Intelligence-Part-2-Copyrightability-Report.pdf
Edit: The article you linked does mention that the works can be copyrighted as a whole, but it does not mention this in the conclusion.
Certainly looks interesting, but I have to mention that I’m not a fan of the Discord Rich Presence feature. The directory access that this typically requires immediately bumps up any flatpak to a medium risk category.
Granted I’m definitely one of those users that does not care to share my current status to all other users as to what I’m watching/listening to at every moment.