Long before Marvel Studios' Disney+ expansion, the comic book giant has already been dominating the small screen with Agents of S.H.I.E.L.D. but for the longest time, fans have been extremely confused regarding the show's canon status in the Marvel Cinematic Universe. Many people believe that the now-defunct ABC series is no longer considered MCU canon after Phase Four shows like WandaVision and Loki retconned its story.
There's also been a long-standing rumor that Marvel Studios chief Kevin Feige isn't a fan of the shows — Agents of S.H.I.E.L.D., Agent Carter, and Daredevil just to name a few — that were produced outside the studio's bubble but Feige himself previously debunked that rumor. Now, actor Clark Gregg is once again reasserting his stance regarding the matter and if you were to ask him, there's no doubt in his mind that Agents of S.H.I.E.L.D. is still canon to the MCU.
Appearing on the Marvel Movie Minute podcast, Gregg clarified that he doesn't take any issue with shows like WandaVision and Loki seemingly altering his show's stories. The Agent Phil Coulson actor also praised Feige for his comments earlier this year about the series. He said: "I read this comment the other day where someone said that, did this diminish Agents of SHIELD? And he [Feige] said, 'You know, I think you're really underestimating how powerful and passionate the fans of that show and the Netflix shows are and were,' and I would never underestimate that or them..."
Also Read: Marvel Studios Seemingly Hints that Agent Carter Series is Not MCU Canon
To be honest, it's still hard to tell whether or not the aforementioned "non-Marvel Studios" shows are actually canon because, for one, the studio has never given us a definitive answer. Secondly, not a lot of casual fans were able to follow them unlike the shows Disney+ has put out so far and I'm assuming that's one of the factors the studio is considering.
As it stands, Agents of S.H.I.E.L.D. is no longer part of Disney+'s library.