Disney+ used to focus on "Making of" documentaries for all Marvel/Star Wars shows that premiered there for a little while. They usually released a week after the last episode.

I think a lot of big shows now have moved into the shorter "Inside the Episode" immediately after it airs, or just make a podcast that can be easily shared/clipped on social media.

Of course they still rarely do deleted scenes or bloopers, which I'd like to see more of.