Update: I was able to find the OEM key using a post on this forum. Is it as simple as downloading W10 from microsoft and using that key to install W10 over W11?
Earlier this year I bought a used Latitude 5285 that came with Windows 11. I am having software compatibility issues and discovered that the 5285 is not approved for W11.  Is it possible to revert to Windows 10 without buying and installing a fresh copy? The reason I ask is that I understand that Dell stores the OEM product key on the motherboard and wondering if that key can be used to revert to W10.
Latitude 5285 - bad W11 install - how to revert to W10?