There are bidirectional DisplayPort <-> USB-C cables, as well as DisplayPort+USB-A -> USB-C cables/adapters that work with the XDR display at 6k, or there are PCIe cards that add a USB-C port with DisplayPort alt-mode support

Only problem is that you'll probably need to extract a BootCamp driver to control brightness/volume, assuming one will exist for this monitor.

(well, if it supports HDR input, you'd use Window's SDR brightness to control it that way instead)