I read many threads about this, sorry if I’m late to the party (they’re closed anyway).
The non-inclusion of Signal due to the author decision doesn’t make any sense, because it’s GPL-3 software and that reason would violate the license itself.
In any case, this comment from the author totally allows it. F-Droid should maintain a Signal build by itself.
So the question is, is there anything else that pushes you back from doing it?
The wiki page states the app includes GMS, but it’s not true anymore.
Anything I missed?