Link https://intervals.icu/ to your Strava account, 60 day indoor W/Kg 2 parameter CP will give you a rough guide to your secret formula ZwiftHQ Category Enforcement level, usually equal or higher than your Zwiftpower level.
It’s common to be say a Zwiftpower C, but be a Critical Power C or B. To be given a Critical Power D would be very rare.
My Zwiftpower three race average W/Kg of 95% of 20mins is lower than my two parameter CP at Intervals.icu , but then most of my races are 6-15min z5 workouts, higher than my eFTP.