Detection of DDV areas

Hello, I would like to adapt the DDV areas in Sen2Cor 2.11. Agricultural areas with different vegetation should serve as the basis. In order to define these areas precisely, I first wanted to expand the DDV area until the corresponding fields are classified as a DDV area. To do this, I mainly adjusted the SWIR reflectance thresholds in the AC GIPP. But this means that a maximum of 30% of the scene is classified as DDV. I have already modified other parameters of the AC GIPP but with no result. The maximum DDV area remained at 30%. Are there other parameters that significantly influence the DDV classification? I was also wondering what those AC GIPP lines are all about:


What does DBV mean? I would be very grateful if someone can help me.