Not officially. Linux is not supported, and BULKHEAD could not commit to it for the Early Access launch. The Steam store lists the game as Windows only and marks Steam Deck as Unsupported.
BULKHEAD says it is still working on official Proton compatibility, with no date. An earlier community-manager message suggesting Linux support was called a communication mistake, and any alpha or beta where Linux worked was happenstance. If you bought it for Linux, the developer's own advice is to refund.