We need REST API endpoint to access the list of User permissions for all existing Jobs.
Another way to implement this feature is to add permissions information to /user/[userId]/api/ endpoint.
https://plugins.jenkins.io/security-inspector/ ?
I would not mind if this functionality was available directly in the core at some point. https://plugins.jenkins.io/security-inspector/ addresses it to some extent, but CSV export is arguably not the best user experience. Contributions are welcome