What isn't working for you? I've been using it for years and have no issues on the most recent versions of macOS. I don't use much of the functionality though, really only just use it to hide icons I don't care about.
Hiding icons is the only use-case I have, same as you.
Ice ( https://github.com/jordanbaird/Ice ) also works, although it's still missing a lot of stuff and also still doesn't have anything to work around the notch. It's being updated though.
If no app works, then it might be something to do with your setup? Maybe some app you use or some change you've made? Very annoying in any case.
No idea what I changed. When I install back Dozer it starts working fine (with Shortcut not working). Then if I have to uninstall the Dozer I clear all files related to it using AppCleaner. So I guess that doesn't interfere either.
I will maybe debug it one of these days when I have some time.
Thanks for the help!