Ka-Block! was my mainstay adblocker for Safari until uBO(L) returned.
One concern I had is that Ka-Block! hasn’t been updated in four years (last app store release Nov 6, 2021) , and that includes filter lists. The project git repo has had only some basic housekeeping commits since then. It still works pretty well, since ad networks evolve slowly, and it’s still what I suggest for older systems. But I’m not sure of its future.
ELement selection seems a little clunky on the desktop version, but it’s there.
What it lacks, mainly, is the option to add filter lists.