I put in a feature request for passthrough to update ESCs at Passthrough to update ESC's. · Issue #21420 · PX4/PX4-Autopilot · GitHub. Not a big deal if it’s not possible, or there is an easier way these days to get it done. But if there is a reason it cannot, or will not be implemented, I would be interested to here why that is. Thanks in advance!
James