SITL with more than one Engine/esc telem

I would like to run SITL for a twin engine configuration. Both of which are outputting esc telemetry.

Is there an example anywhere I can utilize?

Thanks.

Yes, the FETtec ESC telemetry is implemented in SITL. All you need to do is follow the documentation to test it out:
https://ardupilot.org/plane/docs/common-fettec-onewire.html#sitl-simulation