Can't anyone get a RHEL instance on their favorite cloud, dnf install whatever packages they want sources of, email Redhat to demand the sources, and shut down the instance?
There's nothing special or proprietary about the RHEL code. Access to the code isn't an issue, it's reconstructing an exact replica of RHEL from all of the different package versions that are available to you, which is a huge temporal superset of what is specifically in RHEL.