All the people, including Avengers, who dusted in the Infinity War are brought back in Endgame. But they didn't bring back Vision, Loki and Heimdall (as we haven't seen them in a movie except Loki in 2012).
So, are the dusted people just gone to the Soul World? When Spider-Man is talking to Iron Man he mentioned that when he dusted on Titan Dr. Strange was there with him and telling him "Hey, it's time, the Avengers need us". So, is it possible they just told us about the Soul World as the MCU has always this strategy that they give us a small himt about their future?