How does one become the maintainer for an unclaimed plugin? I've been making updates to certain plugins to fix things when they go out of date and it might be nice to share. I wouldn't mind taking some of them over.
Becoming a new maintainer
I think you need to have plugin submitted to umod before you are able to claim other plugin
see "Plugin import process" paragraph from this message
https://umod.org/community/announcements/3200-first-year-end-but-more-to-come?page=1#post-1