In Doctor Strange In The Multiverse Of Madness, we see that Anson Mount returned to play Black Bolt again since Inhumans. At this point, the opportunity was lost for Doctor Strange to recognize Black Bolt from somewhere, or simply to acknowledge that there are also Inhumans in his own universe.

In Ms. Marvel, the idea was to integrate Lockjaw, the pet dog of the Inhuman Royal Family, which belongs to Crystal, and which we had already seen in the Inhumans series. This is known thanks to the statements made by Iman Vellani in an interview, but in the end, it could not be carried out. At this point, the opportunity to bring back any cast members from the Inhumans series, such as Anson Mount, Serinda Swan, or Isabelle Cornish, was lost.

In She-Hulk: Attorney At Law, we see that Jennifer works at a law firm, specifically in the division for superhumans. At this point, the opportunity to explore the problems that arose with the Inhumans after coming from the moon and settling in Hawaii was lost (similar to what happened with the Asgardians after the destruction of Asgard in Thor: Ragnarok).

In Secret Invasion, President Ritson declared all aliens unwelcome on Earth after nearly being killed by a Skrull disguised as James Rhodes / War Machine. At this point, we could have seen the Inhumans flee from Hawaii to the Moon again, feeling threatened that they might be hunted again due to Ritson's statements.