it could be a combination of 2 Tests (linked together), you have to ride on 2 different days or so, as soon as you have finished both tests, the final power profile can be calculated or so?
Before I forget, a power profile should also take into account the age, I have not seen it often, but in WKO5 or intervals.icu you can see it quite nicely age adjusted, so the driver type should also be able to be determined, such as:
All-rounder
sprinter
Time trialist
Climber
Steady-state rider
Pursuiter
I also like the evaluation in power-Meter.cc