FYI - the Deep Mud & Snow setting of the other higher trims is equal to standard X Mode with traction control off in the Premium.
I’ve found for my X Mode to activate, I have to be nearly motionless. The manual states you need to be under 12mph. I get the X Mode screen in the center, between the speed and tach gauges. Honestly, I’ve only used it for the hill descent function while dropping down a steep, deep gravel road. I didn’t need X Mode for any of the snow I’ve hit so far. Good luck figuring it out.