The first flight of the B-21 Raider is scheduled for early 2023. Although, I'm sure prototypes have been flown before this. Although similar in appearances to the B-2 Spirit, The Raider sports new technologies not available at the time the B-2 was produced.
It is slightly smaller and said to be more fuel efficient for longer endurance. The " Roll out " will not have the fanfare and press coverage of the B-2. The U.S I'm sure feels the less said and known about this aircraft, the better.