This product exists: Graugear HUB USB But it needs 19-pin header in addition to the 20-pin one. We haven't found a front panel that only works with 20-pin and the desired connections.

yes, it is designed for 10Gbit/s, and unfortunately we don't have front panels with USB3.2 2x2 ports in our range at the moment, we could offer this port in the form of a PCIe card such as Delock PCI Express x4 card to 1 x SuperSpeed USB 20 Gbps (USB 3.2 Gen 2x2) USB Type-C™ + 1 x USB Type-C™ P