Native vs “some other” power could probably be done. But then it gets more complicate. Intervals.icu will currently use power from “power”, “Power”, “Power2”, “curVpower”, “RunPowerE”, “RP_Power” and “current_value” (if units are “Watts”). I don’t know what generates all those different power fields. Have just seen them in files and added support.
So likely that Connect IQ app would work. Looks like it calls its field “Power2” from the DC Rainmaker screenshots.