Sorry, I haven't been seeing notifications for Fuwanovel lately for some reason.
The development is currently happening on the "maiya" branch of my fork. I don't think there's been a merge in a while so that would be why you don't see anything upstream. https://gitgud.io/WJHB/saimin-yuugi-translation/-/tree/maiya?ref_type=heads
I haven't been making patch files every update because 1. I didn't really feel like it 2. It's not unheard of for me to go back to old scripts and adjust my translation. I was going to make one once the first pass of Maiya's route was done because that seemed like a good milestone, but it's taken a while (at my current pace, I'll finish it sometime in late May-mid June.) In the meantime, HypnoConductor made a patch which was posted in the discord: https://discord.gg/mXCz9hGk
That one doesn't have my latest update, though. Still, if you want to check out what I have so far, it works.