The speed is electronically limited to 45mph.
But...
https://www.dirtlegal.com/blog/2018/...-its-top-speed
$600 to flash the ECU and remove the limit, or free to unplug the speed sensor (but lose your speedometer :-/ ).
Side note: FCA is already trying to kill it:
https://jalopnik.com/jeep-is-trying-...-on-1828080605