GitHub action to create pull request on public repository

Is it possible to create pull requests on public repositories that reside in the same organization using GitHub actions?

Absolutely. Anything you can do in bash you can do in an action.

Here are some examples:

Thank you for the references.

No problem, let me know if you have any questions. The secrets used for the push/PR are just PATs set in the Secrets of the repo or org running the workflow.