If you're looking to add USB ports to a PC, you might see something about USB headers. Are these the same as USB ports? If ...

Trying to hook up the front USB ports on my Maxtop case to my K7SEM 1.0. There are two USB headers on the mobo ... USB2 and USB3, each w/10 pins. The connectors from the case have 9 pins ... each lead ...

You could do USB header -> Hub -> Extensions and then expose each extension externally I suppose, but it would not be pretty. While it won't use your motherboard's USB-C header, there are PCIe header ...