I'm willing to help out (my current account is pretty sparse, my previous one was @lemann@lemmy.one). Only concern is I'm not sure if reports federate to mods on external instances. Aside from that, the !micromobility@lemmy.world community has very active mods too, they might be open to helping out here.
Some kind of vote sounds most sensible I guess. Pinned post with the candidates tagged in individual comments comes to mind
I know this is an old post, but to answer the last question - to become a mod of an abandoned community, you generally need to message an instance administrator (in this case, @tedvdb@feddit.nl) and request to be added as a mod.