Domoticz

Could anybody tell me how to connect SCD41 (i2c) sensor to Domoticz on raspberry pi please ?

You cannot directly.
You will have to write a python or bash script running on your Raspberry to update a dummy virtual device.

See for example: viewtopic.php?t=33516

Thanks for answering. Unfortunately, as I am illiterate in programming, I was hoping somebody had done it. Thanks anyway.

Perhaps find a CO2 meter that can be connected to Domoticz?
Something like viewtopic.php?t=12486

you can use an esp8266 or esp32 with tasmota.
the sensor is supported in tasmota as it is listed here on line 62: https://tasmota.github.io/docs/I2CDEVIC ... 2c-devices