I believe that you already downloaded BSEC 2 library below url.
https://www.bosch-sensortec.com/software-tools/software/bme688-software/
Then, you need 2 steps.
1) Using one of 300s config files below path.
- \bsec_2-0-6-1_generic_release_04302021\BSEC_2.0.6.1_Generic_Release_04302021\config\generic_33v_300s_4d
- \bsec_2-0-6-1_generic_release_04302021\BSEC_2.0.6.1_Generic_Release_04302021\config\generic_33v_300s_28d
2) Using BSEC_SAMPLE_RATE_ULP instead of BSEC_SAMPLE_RATE_LP or BSEC_SAMPLE_RATE_HIGH_PERFORMANCE
Thank you.