The addition of Mixed Reality support for Quest is coming soon in the Synth Riders update. - UploadVR

Synth Riders, the popular rhythm game, will soon be receiving an update that brings mixed reality support to Quest 3 headsets. Kluge Interactive shared a teaser video on Twitter, showing the game's world emerging from a portal in a wall. This update is part of a series of upgrades coming to Quest 3 games, including visual enhancements. While the exact release date for the Synth Riders update is unknown, it is expected to drop soon, possibly during the launch of Quest 3. Kluge Interactive is known for consistently updating the game with new content, including free tracks and paid music packs. In addition to the mixed reality update, the studio is also exploring hand tracking support for the game. For more details, visit the source article on UploadVR.

Source: https://www.uploadvr.com/synth-riders-mixed-reality-update/