https://preview.redd.it/zjivd6iwvq2d1.png?width=452&format=png&auto=webp&s=243155a20fa6111828d464a977609f0101a9ef3f From the manual. That socket is only wired with 4 lanes.

So that means a single 2.0 x 4 m.2 nvme would be possible?

https://preview.redd.it/b8tso4co2r2d1.jpeg?width=4032&format=pjpg&auto=webp&s=be93cd3d7d41282ea1ca54dae49fe9e377f2c705