I just updated a version of my App that has direct integration w/ Intervals.icu and it also supports these custom fields.
However, i can’t test out all variations of the data as I don’t have some of these features on my garmin. (like those avg_right_power_phase[2] ) or GCT Balance so I won’t know if it will look OK after parsed.
if anyone has any comments / feedback that it doesn’t look “right” for a particular computed field, let me know and I’ll try to fix it.