Co2 sensor Tuya

I am using a multisensor ( temperature, humidity, co2, pm2.5, VOC ) , type is
TS0601 by _TZE200_yvx5lh6k.
The values for temp and humidity are perfect, the others ‘seem’ to be reasonable, but there is
something which is strange :
The history diagrams for all three look exactly the same, just different scales.
Either these sensors are fakes or there is something wrong with the integration.
Info : Quirk: zhaquirks.tuya.air.ts0601_air_quality.TuyaCO2SensorGPP