If I am not mistaken SLS (Space Launch System) is a NASA project not a Boeing project. And again IIANM SpaceX’s Big Falcon Rocket is the backup plan for SLS.
“If I am not mistaken SLS (Space Launch System) is a NASA project not a Boeing project.”
It is, but it will be obsoleted by the SpaceX Starship.
“And again IIANM SpaceX’s Big Falcon Rocket is the backup plan for SLS.”
Not the Falcon Heavy, but the Starship.
SLS is obsolete. And many years behind schedule.