Looks like this is the answer, the early Model X refresh cars have USS.
Autopark
We were hoping also to see improvements with the new Autopark feature, or see it expanded to vehicles with ultrasonic sensors (USS), but it looks like Tesla was focused on bringing FSD v12 to additional vehicles with this update.
Vehicles with USS are not only waiting on the new Autopark but also the new
high-fidelity park assist that was rolled out to vehicles without USS late last year.
In December, Tesla's Autopilot lead, Ashok Elluswamy said that the feature
would come to models with USS "eventually." It's possible the feature may be tied to the latest Autopark feature and users will receive both at the same time.