This is from a Google AI search.
"during the Biden administration, the U.S. Air Force announced several contracts to begin developing a supersonic aircraft that could potentially replace or supplement the current Air Force One. These contracts were awarded to companies like Exosonic, Hermeus, and Boom. This suggests an interest in potentially having another aircraft capable of serving as Air Force One in the future."
Also, I read that one of the current Air Force One aircraft was recently retired due to structural issues, which is why we needed another one now before the new planes are built.