CCA coming from ground bases with something like mq-25 tankers. All these loyal wingman project are pulling straw in force projection scenario and long range strikes. The same with using F-35.Where do the CCAs come from? Inside the B-21? Just dump them in the sea after use? Because if they come from a land base then what's the point of using a B-21? Either a smaller aircraft can use the same bases as the CCA or such bases are indefensible in which case Raider is coming on its own.
Using CCA and B-21 stealth/loitering capability to replace NGAD is clearly looking like a patch work anyway... but I cannot see B-21 doing anything else in AA role than guiding a force that will meet the enemy.
If they want to use B-21 like a HQ/flying turret, a crew in a B-21 will have way better loitering time capability than in a short legged fighter. The B-2 for example has a bed, a toilet, and a microwave aboard that help for long mission, don't know about B-21 tho. Yes you can refuel a light fighter but without any means to ease yourself, you cannot scratch a heavy system loitering time.