When will Steamdeck WeMod be released? We need it so badly. We are still waiting. How is the progress?
Welcome to the community. 
WeMod does not officially support Steam Deck. WeMod provides cheating services for PC.
Steam Deck is a Linux-based operating system. Whereas WeMod is developed for Windows operating systems.
There is an unofficial, third-party guide to getting WeMod to potentially work on your Steam Deck, which you can find easily by using the search tool before posting. Here you go: My perfected and streamlined WeMod tutorial for Steam Deck.
Note this is a third-party guide. WeMod itself cannot provide assistance for operating systems it does not officially support.
Have a pleasant day.