Same problem here. I had it working with ReShade 1.1.0.963 / SweetFX 2.0. Now I'm trying to update to ReShade 3.0.7, the current version. So far it doesn't show up. Maybe this will help, I haven't tried it yet, it was recommended on reddit:
steamcommunity.com/groups/SweetFX/discus.../666827315570742308/
Edit: I fixed it by putting both dxgi.dll AND dxgi.ini into the x64_retail folder. Hopefully that will solve it for you as well. I also did this on a clean reinstall, as I had somehow messed up my earlier installation with a previous version of ReShade / SweetFX.