Since the Karen's Repo has been totally inaccessible since July 2024, there's (almost?) no way to get the latest version of this tweak (the archived version in archive.org was uploaded in May 2023, so that version still hadn't support Rootless jailbreak yet).
The only way I know to get the latest version of this tweak is to build it directly from source. But the current source code is literally unable to compile due to a bunch of ) expected compilation errors. So I spent the entire day to research this myself and found out that thing happened because of Theos' latest version.
So in order to build the latest version of AppSync Unified, we need to do more work than in 2023.