i haven't an external meter to check the right parameters, but seems that DHT22 measurements are more realistic.
Is possible that measurements of the DHT22 into ENV Hat are so far from the real ones ?

may I have been wrong to call the functionality ?
For DHT22 i copied DHT12.h and DHT12.cpp from example and use in my project as follow

DHT12 dht12;

setup() {
    M5.begin();
    Wire.begin(0,26);
    ...
}


loop() {
    ...
    float actualTemp = dht12.readTemperature(1);
    float actualHumi = dht12.readHumidity();
...
}