I believe that you already generated your own config file.
Then, you can use custom config file in our BSEC 2 library. https://www.bosch-sensortec.com/software-tools/software/bme688-software/
Please download bsec 2 software, and there is example file in BSEC_184.108.40.206_Generic_Release_04302021\examples\bsec2\examples\basic_config_state.
What you should do is to replace config original file with your own file.
(You can find config files in BSEC_220.127.116.11_Generic_Release_04302021\config)
Then, you can get BSEC_OUTPUT_GAS_ESTIMATE_1 ~ 4 in output.
... View more