Subdomain support for codeberg pages has launched on https://codeberg.page. There might still be some issues we need to sort out next days, but now users can refer to their pages repos by linking to https://<username>.codeberg.page.
The traditional URLs https://pages.codeberg.org/<username> continue to work for the time being, but might get phased out at some point in time as some reports claim an increased attack surface with this approach (even if we are not aware of any real threat we'd of course love to reduce possible attack vectors as much as possible to keep the platform safe).