"If successful, in short, the B-21 will present U.S. and allied commanders the opportunity to exploit command of the air before winning it."
Secretary Kendall portrayed the newfangled stealth bomber as part of a “family of systems” that likely includes a retinue of low-observable drones—“collaborative combat aircraft” in air-force newspeak—at the very least.
Drones accompanying the Raider as part of the family of systems could render solid service by riding shotgun to defend it, or by helping out with such key tactical functions as scouting, counter-scouting, and command-and-control. Kendall reported, moreover, that the bomber itself is designed to execute missions far beyond simply penetrating hostile airspace, World War II Combined Bomber Offensive style, and dumping large volumes of ordnance on targets assigned to it.
For example, it could presumably act as a surveillance, communications, or battle-management platform.
Source: 19FourtyFive - YouTube