The Avengers tower has been iconic over the years as the superhero team's base in New York across a variety of comics. However, in the Marvel Cinematic Universe, it was originally Stark Tower before Joss Whedon's Avengers: Age of Ultron saw it converted at the film's end into the Avengers Tower, sporting that famous 'A.' Despite being a huge landmark in New York though, it hasn't been seen much in the television pocket of the MCU, which has led Marvel's Head of Television Jeph Loeb to explain its absence.
"I think it’s much more that we look at it from the point of view of 'where are we?' and having to establish that along the way. In many ways, being less specific helps the audience understand that this could be on any street corner," he said to Inverse. "Where we’re sitting right now, I can see the Empire State Building, but if we were sitting 30 blocks that way, I wouldn’t be able to see the Empire State Building. That doesn’t mean it doesn’t exist. It just means that we can’t see it from where we are."
So while fans didn't see the building in shows such as Daredevil, Jessica Jones, Agents of S.H.I.E.L.D. and The Defenders, Loeb more or less maintains that it is there -- but isn't needed to really signify New York. While other MCU connections have been teased in these shows, especially Whedon's Chitauri invasion from The Avengers, fans may not get another chance to see this tower on television given that Stark sold it to an unknown buyer in Spider-Man: Homecoming after the Avengers moved to a new headquarters in upstate New York.