I know this but I don't see it as a cancellation. Because a real cancellation doesn't happen like that. In a real cancellation, they don't air the 5th season that was filmed.
They did it with Disco.
Even if they aired it, they wouldn't bother to make it suitable for the finale. Or they cancel it after it aired.
You assume that Paramount adheres to principles of "justice" and "fairness".
They don't.
I don't think Paramount sees it as a cancellation either. They just watch the episodes and look at the scripts for the next season. They say that's enough and reshoot the last episode or make it suitable for the finale with additional scenes. I think Paramount has a 5-season argument for Star Trek. My guess is that they will either approve the 5th and final season and close it. Or they will cancel the 4th season and wrap up the story with 2 TV movies or 1 3-hour TV movie.
Or they'll do what they did with Disco and cancel it at the last minute (P+ cancelled the show while the cast was at sea on the Star Trek Cruise).