Hello there,
since there have been few users who did buy the game and couldn't play it because they have Vive Cosmos. I would like to make it clear - as it's stated on our Steam page - we support Valve Index (full finger tracking), HTC Vive, Oculus Rift and WMR. We will add support for Vive Cosmos as soon as it arrives in our office - probably in two weeks time.
Thanks for all kind words, playing our games and constant support - we keep working hard on the game!