Valve is reportedly 'looking into' a standalone version of Half-Life: Alyx for its new Steam Frame VR headset, but still requires a lot of work.

TL;DR: Valve launched the Steam Frame VR headset with an Arm-based Snapdragon chip, aiming to run Half-Life: Alyx natively and streamed from PC. The new hardware features a “Frame Verified” status for optimized games, while rumors suggest two upcoming Half-Life titles supporting PC and VR cooperative play.