Bryan, I assume all the other faucets work normally.
Try to follow the line to the tank, see if there might be a valve to turn it off inside is my guess. It is possible the valve in the faucet is broken completely. Might also contact manufacturer via email to see if they reply and if they can offer any advice. It's odd that hot works but cold doesn't.
Two Wire Fox Terriers; Sarge & Sully
2007 Winnebago Sightseer 35J
2020 Jeep Gladiator Rubicon