When the global permission for "Create team-managed projects" is "public", the explanation of "public" will be misleading

The explanation of Public is "anyone on the internet, including logged in and anonymous users", but the people who can create next-gen project are only licensed users (not anonymous users). This is a misleading explanation.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available

Notes

I agree that the text in the UI is misleading. The documentation clarifies that it is not possible for anonymous users to access a team-managed project 

Currently, you can't allow anonymous access to a team-managed project. If you want to allow anonymous access, ask your Jira admin to create a company-managed project for you.