“DLSS2” and “DLSS3” are not references to the version of the DLL. They are references to different output modes of the DLL, which is also backwards compatible, i.e. the 3.5 DLL can output either mode. The Starfiels mods that were available immediately at launch do not use DLSS3, or by extension frame generation. It doesn’t matter which DLL version you use
Sure it can, I’ve got no problems using frame generation on my 3060. Any RTX card can do it