Example: you visit https://example.com/ and have kirby panel opened?
You can move the panel to a different URL described here, but im not sure about making it the root.
Maybe you can with a custom folder setup.
Different URL: Neither slug => '/' nor slug => '' work, I’ve already tried that. Will investigate custom folder setup.
Edit: The custom folder setup is for directories only, not URL. Will update the OP accordingly.
Thanks anyway.