Heft is actively developed by the Rush Stack community. There are various community options for help:
Found a bug? You can open a GitHub issue in the rushstack monorepo where Rush is developed
Zulip: Chat with Rush developers in the Rush Stack 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!