The RADV driver in Mesa for AMD GPUs on Linux and Steam Deck is set to get Ray Tracing turned on by default for the upcoming Mesa 23.2 release.
Previously you could try it in certain titles, and there were ways to enable it manually but now you won't have to do anything as the code to turn it on has been merged. Once you upgrade to Mesa 23.2 after release (scheduled for August 2nd at the earliest) with an AMD GPU, you should find games able to use it.
This has been a long time coming, so it's really great to see Ray Tracing really getting into shape for those with an AMD GPU. It also means it will be doable on Steam Deck whenever Valve upgrade SteamOS to have the newer Mesa version, although it likely won't run too well there in many titles.
You can read more on the behind the scenes work from developer Friedrich Vock on their blog post.
What are you looking forward to trying with it?