Northrop Grumman B-21 Raider (LRS-B)

[Hydroman]

Can you stop this useless what-if may be perhaps possible designation off-topic?
AF didn't have to redesignate any of B-2 test AVs.

Yes flateric, the USAF rotates a single B-2 (from the various tail numbers) through flight test when need be, primarily when upgrading the aircraft, mainly for systems upgrades, they don't re-designate.