So I've made a lot of Agents Of S.H.I.E.L.D. posts on this subreddit, and there's always people who go 'Not MCU', and they say the same thing about Agent Carter, Runaways, and Cloak & Dagger. That is factually incorrect. All of those shows were created for the Marvel Cinematic Universe (franchise), and are therefore a part of the franchise. Canon means something happens in the 616/199999, and if some higher up at Marvel decides that the aforementioned shows aren't canon (which is stupid), those shows will still be a part of the MCU (franchise). Saying that those shows aren't a part of the MCU because **you as an individual** don't believe that it's canon, is like saying that Your Friendly Neighborhood Spider-Man or Marvel Zombies, neither of which are canon, are not a part of the MCU.

tl;dr: There's a difference between being a part of a franchise, and being canon, and they aren't the same thing.
What an 'MCU show' means