Installed the full ISO version of 10 Pro, activated, updated, all drivers, etc... Game DVR works and records the clips and shares them for Minecraft Win10 Beta.

Loaded up Rust and can take screenshots, but will not record. Screenshot can not be shared, says its not a game.
Loaded up Team Fortress 2, and I can record, and they show up in Xbox App, but says its not a game when trying to share.

Search results say you used to be able to tell Windows it was a game so you could, but I don't see that option and am guessing it was removed.