

I’m guessing they’re all just behind an internal hub.
https://www.amd.com/en/products/processors/chipsets/am5.html
The x870e chipset only provides 2 20gbit ports (type c only) 12 10gbit and 2 5gbit ports. No idea how the USB 4 ports fit into the equation, but I think the 2 are mandatory.
They’ll somehow make the client 32 bit but still need a 64 bit computer.