If you use the framework version then you have a folder in your game folder with the name "ReShade", inside several shader compilations and files for different settings.
There is a file with the name "Common_settings.cfg", when you open that file in a text editor (notepad++) and you scroll down then you find the "Display Depth" section, this is where the depth range is set (don't know if "depth range" is even the right term for it).
Above in the first section "Choose effects" you can enable depth buffer output "#define RFX_DisplayDepth 1", then ingame you press F12 (depending on the version it is another key) and you see the depthbuffer. Depending on how that looks, some of your effects will look different stronger/weaker. If it is completely black then there is no information for MasterEffects depth of field effects and everything gets blurred the same.
By changing these settings you can get the dof to work sometimes, some of the games in the compatibility list actually have a working depthbuffer but ReShades initial setting are not set in the right range for it to get displayed correctly.
At least that is my understanding of it.