The official Link cable is an (overpriced) optical cable. Theoretically that is supposed to make it better over longer distances, but actually a decent 5m USB3 cable works just as well – for a third or so of the price.
If you want to be on the safe side, buy one that has been tested for VR/Link. Search for ‘KIWI design USB C Link Cable’ e.g. on Amazon. Comes with a built in signal amplifier.
If you happen to have a good Wi-Fi 6 router (ideally with your PC connected via a LAN cable), cable-less AirLink is also a viable option. How well that works heavily depends on the Wi-Fi connection’s quality though, so for the least possible amount of compression artifacts a cable is the safer method.