It's a teardown, the Sony SKU is clearly marked on the sensor assembly ?
Just putting this out there - Nikon does not have the capacity to design image sensors from scratch, like many big companies such as Apple, Fuji, Phase One, Hasselblad, they buy off-the-shelf products from Sony Semicon, the key difference here is Nikon secured exclusive supply from Sony, the IMX309 in D850 is an example, and possibly Z7 as well.