@lobingera
For gcc, I have the following official roles:
Global reviewer
Aarch64 reviewer
Libobjc maintainer

A reviewer in gcc is basically a maintainer who can approve patches from everyone but has to get approvals for their own. Gcc deciced a few years back (maybe over 10 now), to change the global maintainer role into a global reviewer role. But global reviewers have a huge say in the project.
I am also for the last 3 years or so to have the 3rd most commits in gcc. Averaging around 30 commits a month.
I have been gcc unofficial bug triager for the last 20+ years (this is not an appointed role, I just have been doing that long). I also Averaging around opening one issue a day for the last 4 years.
I also write the weekly newsletter for the gnu toolchain, something which I started to get do mentorship and more people interested in gcc (and other part of the toolchain).