Upload workout(fit file) manually

I just completed a TriAcademy workout but I realized that only a smart-trainer was connected to Zwift, so in Zwift activity I have only power and speed data. But simultaneously I recorded the same activity on my watch with all data(power, cadence, HR) .
So my question how is it possible to manually upload data(fit file) to zwift tri academy instead of existing activity?

Sorry, upload to Zwift is not possible.