My guess is that the USB Type C port on the front panel is NOT connected to any mobo USB header.
USB Type C sockets on a front panel need to be connected to a mobo USB header. It is MUCH preferred to do that with a USB 3.2 header, NOT an older USB 2 header. To do that the case normally has a cable coming down from that front panel to plug into a mobo header.
The cable may be either of two types. One type has a standard USB 3.2 header connector on it to plug into a mobo header that may be called "USB3" or USB3.1" or USB 3.2 Gen1" or USB 3.2 Gen2 or "USB 3.2 Gen 2x2". For the first four of those, the header has 19 pins (2 rows of 10 each with one pin missing) in a surrounding collar, and contains TWO USB 3.2 ports of Gen1 or Gen2 version. Thus the cable normally connects to TWO front panel sockets, whether Type A or Type C. On older mobos there may not be ANY USB 3.2 header, but most mobos for many years have them.
The other type has a very different connector that looks like the very wide multi-contact lower one on the end of this cable
It must plug into a new mobo header called Type E which normally contains ONE port of the fastest USB 3.2 Gen2x2 variety and thus connects to only ONE front panel Type C socket. Now, many mobos do NOT have that header built in, so a case with this type of front socket and cable cannot plug the cable into any mobo header, and is useless in that form.
So, you need to look inside your case and find the cable coming down from the front panel. Where is it plugged in, if at all? IF it is the second type with the Type E connector on the end and you do not have such a mobo header, you can get an adapter to convert one unused mobo more-common USB 3.2 header (the 19-pin kind), like this
It plugs into a mobo 19-pin header and converts that to a Type E mobo socket you can use to plug in that cable type. This will still supply only one USB 3.2 front panel socket, and its version will be either Gen1 or Gen 2, depending on your mobo header version. But that WILL work as a normal USB 3.2 port.