DLSS Frame Generation is not present in the video options in the Gamepass version. I played the pre-release version on Steam and was able to see it and enable it on my RTX 4090. My drivers are up to date and HAGS is enabled in Windows 11.
There are several reddit threads discussing it, such as this one:
I don’t think this a HAGS not being turned issue, for some people at least.
Me, and other Gamepass version users, have it on already, but the Frame Generation is not available. It is working fine in other games. I’m on a 4090, current drivers (Win11, if that matters).
Thanks Lev, I noted in my original post that I already had HAGS enabled and Frame Generation is still missing. It seems like the issue stems from the Gamepass version itself rather than the users hardware/configuration.