As much as I’d like to reassure you, I’m afraid I won’t be working on a Linux version anytime soon. Developing for Linux would mean almost starting from scratch, as the app was originally built natively for macOS and Windows.
Additionally, I don’t have a Steam Deck myself, so I’m not sure if it’s even feasible to get it running on that platform.
That said, I’m aware of the demand for Lookupper on the Steam Deck, and I’m keeping it in mind for future development. For now, though, I have a lot of work to focus on for the current Windows and Mac versions. Thanks for understanding.