FujiHack will only ever work on Fujifilm X/GFX/HS/F/Z/Pro cameras. You can put your firmware file into the web patcher to see if FujiHack is compatible with your firmware type. In general, FujiHack does NOT support the XP and S series Fujifilm cameras. The S Series has already been hacked by CHDK forum members.
The firmware debugger patches are written in ARM Assembly. Most Fujifilm cameras run a custom ARM v6 SoC. Everything else is written in C, with some experiments in Rust.
This is an open-source non-profit project, and isn't backed by any company, and has no deadlines or plans. Consider it a miracle that it exists in the first place.