Yes, of course. DXR is pretty closely tailored to Nvidia, being the first and only ones by two years or so to have hardware supporting RT. But it was posted, that developers do not face the same restrictions on console hardware, which basically is AMD. So, it would be interesting to see, whether or not this is mitigated by vendor-specific vulkan extensions where each vendor can do as it best suits their hardwares' capabilities.
Speaking of
AGS and it's use in games: Is Dirt 5 RT out of private/closed Beta yet? Last time I checked, it required a special key in order to activate it.