I gave the Oculus Rift S version of the game a go on my own setup using SteamVR but no bueno, the game wouldn't start. It'd be great to have it work with SteamVR since it's the biggest platform for PCVR, but I'm not sure how you'd integrate that given that you already have Oculus support.
It's a shame I don't get to have a go at it just yet but it still looks fabulous. Best of luck on GNAM! :D