Speed slow on zwift

Hello, i’m a new zwift user
Using magene cadence & speed sensor,
Magene heart rate sensor
Deuter indoor roller

Speed and wattage on zwift seems low around 1-5kph despite effort on cycling

The speed you travel in Zwift is based purely on the power (or estimated power) you are generating. It doesn’t actually matter what your speed/cadence sensor says. The algorithms for power calculations from dumb trainers and rollers are very broad because there are so many factors at play.
Basically; a power meter makes for the best experience