How can I make a public feed group?

A feed can be made "global read" or "global read/write" by emailing https://getstream.io/contact/support/ from an email address registered with the organization under which the application is a part of with the following information

1. AppID
2. read or read/write
3. name of the feed group which you'd like to enable this feature on.

We enable read or read/write on feed groups, not individual feeds.