No. WDDM 3.1 alone does not determine support for “Windows 12.”
There is no official Windows 12 release or published support requirement in the provided information. The available information only shows that:
- WDDM 3.1 was introduced with Windows 11, version 22H2.
- WDDM 3.2 was introduced with Windows 11, version 24H2.
- Microsoft Q&A entries in the provided information state that there is no official Windows 12 release or announced requirements.
So, having WDDM 3.1 only confirms graphics driver support associated with Windows 11-era releases. It cannot be used to confirm compatibility with Windows 12.