I think the shape might actually be correct.
The B2 has an RCS about 100x that of the B21 Raider (or, so I have heard from my Chicom friends)?
The B21’s RCS is reportedly smaller than an insect, with some claims suggesting it’s around 0.003m², comparable to the size of a hummingbird (from a Reddit discussion on r/WarCollege).
Unprecedented stealth: A Washington thinktank’s paper advocates for large-scale acquisition of the B21, citing its unprecedented stealth capabilities (from an article titled “A Paper Backing the B-21 Claims It’s Smaller Than an Insect to Radar”).
Relatively speaking - this is more in-line with the RCS of the F22 - which is interesting. However, on the other hand, the Chicoms use higher frequency 5G irradiance sensing over their domestic mainland - so, they can report by cell zone in real time. Their ULDB balloons are helpful in triangulating low RCS stealth for targeting their A-A missiles - much like our AWACS CNC.