This is the very beginning of Azure DevOps to GitHub migration tooling.

All open Product Backlog Items are converted into issues.

Related Tasks are converted into a task list and added to the description of the issue:

Due to the nature of issues on GitHub it is:

• impossible to create an hierarchical backlog
• replay the history of or backdate items
• impersonate the original author

Therefor it is useless as an audit trail and should not be used for that.

Try it out and import the first 50 PBI's into a temporary repository!