Superheroes in the Marvel Cinematic Universe seem to mainly have two modes: actively working or dead. Even when Clint Barton claims to be retired, he still usually finds himself with a bow in his hand before too long. This makes Steve Rogers a somewhat interesting case. At the end of Avengers: Endgame, Steve seemingly became the first MCU hero to truly retire from active superhero duty. Since then, he has only been alluded to by characters, but his status is never really confirmed. However, there are some hints that point to him having died sometime post-Endgame.
When other characters speak about Steve Rogers, they refer to him in the past tense most of the time. These aren't strangers but Steve's fellow Avengers and closest friends. Another big clue is his lack of involvement in any of Phase Four's goings-on. While he can no longer physically fight, it seems strange that a man with as strong ideals as Steve Rogers would simply disappear from global politics or the inner workings of the Avengers.
Steve Rogers' Friends Don't Talk to Him Anymore
It's very clear through the dialogue and actions of characters like the new Captain America Sam Wilson and Steve's ex-partner Bucky Barnes that Steve is no longer around for them to talk to. Apart from Sam straight up saying that "Steve is gone" in The Falcon and the Winter Soldier, both refer to Steve in the past tense, talking about what he "would have wanted" instead of what he currently wants. Sam also struggles with trying to live up to Steve's legacy, something Sam might reach out to Steve about if he were still around.
Some MCU fans point to a line by Bruce Banner in She-Hulk: Attorney at Law as potential proof that Steve is still alive, though it isn't the most convincing piece of evidence. When discussing Steve, Jen remarks on the possibility that Steve died a virgin, to which Bruce replies, "Steve Rogers is not a virgin." By referring to Steve in the present tense, some fans see this as proof that he is still alive. However, it seems strange that Bruce would correct Jen about Steve being a virgin but not him being dead if he is still alive. While not conclusive one way or the other, these lines across several Disney+ projects seem to imply that Steve is no longer alive.
Steve Rogers Would Want To Be Involved in Some Way
Steve Rogers was consistently getting involved in matters he saw as important in the MCU. In Captain America: Civil War, he tells Tony that he can't help but get involved when he believes he can help and that he wouldn't have it any other way. It seems that if Steve was still alive, he would be trying to stay involved with important issues. Perhaps he could pursue politics like he did in What If...? Season 1, Episode 8, "What if Ultron Won?" At the very least, it seems like he could speak out publicly. As both a superhero and an American icon, his word would likely hold a lot of sway.
It isn't like there haven't been issues that Cap would have wanted to weigh in on since his retirement. For one, he would likely have been opposed to passing the mantle of Captain America on to John Walker instead of Sam Wilson. After his time travel adventures, it makes sense that Steve couldn't be involved in activism or politics before he caught back up to the main timeline for fear of changing the future; once he reached the modern day, however, he could do so without fear of ramifications. If Steve were still alive, it would be a pretty big shift in his character to ghost all his friends and not stand up for his ideals. However, if Steve is dead in the MCU, that doesn't mean audiences have seen the last of Chris Evans as Captain America. With the Marvel Multiverse in play, fans should expect anyone to make a possible cameo in future movies or shows.