Look at the buttom of the file: https://gitlab.com/fdroid/fdroiddata/-/blob/master/metadata/github.daneren2005.dsub.yml
There is a unknown maven repo ‘http://4thline.org/m2’ that disables the f-droid build.
I’m not in the whole brave thing in. But… For me LibreWolf is for the desktop a better choice, it offers many more privacy settings and is based on Firefox. And on my Android I use “Privacy”. It disables JS at deafault and has some great handy tools. However, Brave doesn’t have such things. Also does Brave looks soo commercial.
F-Droid supports multiple architectures. See Fennec F-Droid where combining these architectures to one APK is not able. But if that’s used, our bot can’t auto-update apps…
For more questions, just ask :D
It is a Firefox-based Fork with some security fixes like disabled-telemetry etc