Yes, OpenVR games will work (on Rift CV1, Rift-S, and the Quest series if using Link or Airlink).
They aren't supported directly (Oculus has no OpenVR support), but there are two ways to play them.
1 - Using SteamVR (need to install Steam and SteamVR). The games don't need to come from Steam, you just need Steam for the VR support.
2 - OpenComposite. This redirects OpenVR into the Oculus software without needing SteamVR. You can get it from https://gitlab.com/znixian/OpenOVR (they changed the name from OpenOVR to OpenComposite, but website name remains)
You'll need to enable Unknown Sources in the settings to play OpenVR games, since they aren't allowed in the Oculus store. In the desktop app go to Settings / General. It's the top option.