Adding new use cases and actions to existing Google-built integrations: what are the options?

Hi all,

We have a requirement to add new use cases and actions to a few existing integrations:

• One integration is built and managed by the Google team, and it is available in the content-hub GitHub repo.
• The other integration is part of a content pack, and it is not available in the GitHub repo.

Is there an option to contribute these changes to the existing integrations? Or do we have to create a new community or partner integration, cloned from the existing one?

Specifically:

1. For the integration in the GitHub repo, can we submit a PR, or should we send an enhancement request?
2. For the content-pack-only integration, where does the source live, and how can we contribute until it is added to the repo?
3. Is there a documented process for this, and who is the right contact?

Thanks!