Judge Dredd was also 'propaganda' as you call it; it was an example of facism taken to a ludicrous extreme. This same example was taken even FURTHER than ludicrous w/ Marshall Law.
Thats not to say that they don't have merits; Comics like Judge Dredd, Maus, Tank Girl, et al. were entertaining reads that had room to tell stories to make you think a little deeper about the world around you while appreciating tank girl's missile bra or the artists rendition of a fight through an automated slaughterhouse.
Of course you have the same thing with american comics; DC is/was basically greek mythology stories, while marvel's X-men was a direct reference to the civil rights movement at the time.
One of the problem modern filmmakers/writers have is thinking that comic books are a genre of media and not a medium itself; They aren't adapting comics properly anymore. Marvel was doing it right until Disney took them over and the Spiderman/Venom movies are still getting it right (mostly).
If the Supergirl's writer really only has one writing credit to her name and was given this opportunity I'm chalking this up to another DEI failure.