Because elections and voting are trigger issues, it's a huge challenge.
Ages ago, before I burned out, Election Verification Network (EVN) was really good. Bringing together academics, activists, officials. Very low key, low profile. To avoid the outrage machine.
EVN mostly focused on gear and procedures. Not much overlap with adjacent topics.
I organized an every-partisan election integrity group for a while. We had some small local victories. (Prohibit putting serial number on paper ballot linked to voter ID. Delayed adoption of janky new gear.)
But drift into adjacent issues and coalitions fall apart. For instance: Voter registration databases. Correct answer is universal automatic voter registration where everyone is listed and has an eligibility flag, with audit history. But improving data quality is a no go because of misbelief that higher registration (and participation) has partisan advantage. (Spoiler: It doesn't.)
Another fundamental problem is being outside looking in. Asking the establishment to modify the very system that got them their power is really, really challenging. The vetocracy. That's why all these stupid obvious reforms with +70% support languish. Default answer is always "no", with demands for ever more ridiculous standards of proof, because reasons. This is a fundamental trait of all orgs, groups. Why would the public sphere be any different? Sadly, when change does finally happen, it's disruptive. Punctuated equilibrium vs slow and steady progress.