I suppose that making a lignux version would be hard to do.
But to make Wemod, just wine compatible would cost you not as much effort,
and with Steam Deck and migrations in old PCs from MS WOS 10 to Lignux it will
help a lot of users.
So far, the only workaround for Steam Deck is the following community-made topic
Otherwise, you can load Windows onto your Steam Deck using various methods, then install WeMod onto that. Some users (including myself) have done this.