As far as I know,
‘Phone Control Mode’ ( ‘P’) does not have a ‘VOX’ function.
VOX would be used in simpleusb etc. Mainly designed for use in HF remote base and could be used for other things…
I don’t think this road will lead you anywhere.
I suppose you can jerry-rig something against a private node if that is your desire.
But nothing built -in. other than the above mentioned.
Perhaps someone knows a fast and easy way to the end game ?