I see what's happening now.
The USB-C ones, are missing the "Overview" section that in other entries holds the RAM and Storage specs.
It's probably a glitch with those specific models for some reason.
While I can't tell you why it's happening, I'm pretty sure it's not intended by Apple to hide the specs.
What I can gather, is that for some when there's a USB-C model with our those specs, this is a regular model with those specs at the same price, so one can assume the specs would be the same.
Unfortunately in the case of the $8,499, one you link to, there is no other model, but since price goes up, one can assume it has at least 2TB of storage and 192GB of RAM as the previous ones that are $350 cheaper.
With that said, it's definitely something they need to correct.