Thread:BEJT/@comment-27724978-20190428201630/@comment-26838855-20190428202431

That's been suggested, but it's not possible because he would've had to come back out in the machine in front of Hulk, Bucky, and Sam. They established that it's not a case where you just, for example, in 2012 say, "And now I'm jumping 11 years into the future again" (in which case you'd end up in the splinter timeline's 2023, not main one) but rather you're returning to the point where you left - machine, place, and time (5 seconds or so later). That's why Hulk talks about how it doesn't change their future, because they're always going to return to main 2023.

Since Steve didn't appear there, it means he never left the main timeline when he went back to live with Peggy.