I do strongly recommend using automated PRs with bloom. But unfortunately this won’t be enough to get you into the automatically generated list.
The report is generated from the debian packages themselves that are being synced. And although we support multiple maintainers in the package.xml and we expose both the first and the list in bloom However the debian package policy is to have one maintainer in RFC822 format because of this discontinuity the debian template select the first listed maintainer and not the full list. Which looks to be Austin in Noetic.
We could do some slightly more advanced logic to merge names but keep the first email to stay within the RFC822 specification. A PR along those lines would be appreciated.