as of 20-4-24 the 202402 firmware now has RusEFU and AEM Canbus Wide Band available.
so if you have an AEM canbus enabled wide band controller you can connect the can H and can L to the canbus on the STM Pro ecu and select WBO over CAN select the rusEFI WBO and both are available to be used.
make sure you have the canbus enabled under accessories and CanBus/serial menu and Internal CanBus is enabled.