Reactions - Allie's America: is hearing through the grapevine. She isn't the biggest fan of Stark where she comes from, but she wouldn't wish being dead in another universe on someone.
Daisy: Will be hearing from probably Barbara, and be offering her services to the portal/science team to help locate Tony.
Dinah: Will hear through the grapevine and just be like "oh that sucks", and then go back to work. Sorry, she doesn't really know Tony very well.
Gamora: Doesn't know Stark that well, but will still be concerned. She will offer to help where she's needed.
Kara: She's sad, because she liked Tony. As Pepper's assistant, she probably heard from her, and is going to help her as much as she can in the coming days.
Morgan: Yeah, she is traumatized all over again. She was also with Pepper at the time when Bruce told her, and tries to not break down right there, but she is really hurting right now. She had gotten a second chance with her dad, and she feels cheated. While not right away, she is definitely going to start to spiral downward as old wounds from her childhood are opened all over again.
Rey: Also didn't know Tony very well, but thought highly of him. She'll want to comfort her friends who are hurt, such as Mantis.
Sabrina: While not super close with Tony, she thought he was nice, and is a little sad. She's mostly concerned about Peter, especially after he 's already lose Ned. She's definitely going to be sticking close to her boyfriend and making sure he's supported.
Valkyrie: She respects Stark, and will be supportive and there for Thor. She'll also offer to help around the compound if needed.
Wanda: Finds out when Vision does. Though she had her issues with Stark in her world, she had managed to have a good relationship with this one, and he's important to Vision, and their friends. She will mourn.