Not among younger MCU fans. I left engineering about 15 years ago in order to work in education, and since then I have regularly worked with Millenials and now Zoomers. I never run into any who collect comic books, but I regularly chat with younger people who are fans of the movies. Iron Man, The Incredible Hulk, and Spider-Man get mentioned far more often than Captain America, whom the younger kids seem to find boring. Wolverine was popular among people my age (Gen-Xers) but there has never been that much awareness of the character among my students.
It seems like there's always more of a focus on characters from recent movies, but even when the Avengers movies were all the rage, Captain America didn't seem to spark much interest. Deadpool doesn't get mentioned as much as he did when the movie came out, but even he would probably rank ahead of Captain America among the Millenials and Zoomers.