The Rush Stack projects are coordinated by a team within MS Office. Although Microsoft does not provide official support, there are various community options for help:
Found a bug? You can open a GitHub issue
Zulip: Chat with the Rush Stack developers in the Zulip chat room
If a PR needs attention, try asking in the #contributor-helpline chat room. We carefully review each submission before merging, which is time consuming work. The maintainers are all people who manage large corporate monorepos with regular daily distractions, so PRs frequently get overlooked. Your contributions are greatly appreciated -- we do want to get that PR reviewed!