@chiu-pk
The LED status is good, this receiver should be recoverable assuming the wiring is correct.
Could the M0184 firmware update have caused the receiver to lose its previous binding/configuration?
Yes some updates will unbind the receiver. If you want to put the receiver back in bind mode and voxl-elrs doesn't work, hold the button for 5 seconds and it should enter bind mode indicated by the led status rapid double blink
Is it expected that voxl-elrs ping gets no response while the receiver is waiting for binding?
voxl-elrs ping should work in both cases, but to be sure try to bind and see if it works
Is there a recommended recovery/reflash or reconfiguration procedure for the M0184 in this situation?
Try to get voxl-elrs working if possible, if not then using the expresslrs configurator pointed to our custom fork of ELRS with a USB serial adapter that supports 420000 baud will allow you to update
https://docs.modalai.com/elrs-configurator/
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