Yes, you can use BackHub to export GitHub issues.
GitHub repository backups include not only the repository itself, but also the metadata, such as GitHub issues, milestones and so on. Here are the contents of a GitHub repository backup.
To export GitHub issues, you must first create a full backup of your repository. If you haven’t already, follow the instructions on how to install BackHub here. Once installed, wait until the backup of your GitHub repositories is completed.
Open the panel of the repository backup that contains the issues you would like to export. If you have installed BackHub a while ago, you can either choose from older snapshots or keep the current one. Click “Download Metadata”.
The download comes as a ZIP file. The ZIP file older “issues” lists the export of your GitHub issues. Each issue comes as a JSON file with a filename equivalent to the issue ID.
The GitHub issue export contains all sorts of information. Besides the author, assignee and labels of the GitHub issue, the title and body are important. Search for “title”: and “body”: to quickly find what you are looking for.
You can use the GitHub issue export to archive a repository you are no longer working on, or to process the data for any other purpose.