I recently learned how to copy labels from one repository to another.
As far as I know it's the easiest way to bring existing Github labels to a new or existing repository. Creating a new repository from a template doesn't seem to include labels at this time.
Install Github CLI
Start by installing the Github CLI if you haven't done so already.
Next, you'll have to login with gh auth login.
Clone your labels
Github CLI provides a very convenient label cloning command that lets you copy all of your labels at once:
gh label clone username/source-repo --repo username/destination-repo
The above command will copy all the labels but won't delete existing labels in the destination repository.