@PuercoPop Teams in Guix are an attempt at addressing these very problems (we purposefully chose not to have per-package maintainers back in the day).
https://guix.gnu.org/manual/devel/en/html_node/Teams.html
Someone who submits a patch automatically has members of the relevant team(s) Cc’d.
But again, tooling is not making it as easy as it could, especially for team members.