>>103254074
Yes, the CDN needs a valid login, install with the DVD ISO to get offline package installation. After that, you will need to add the EPEL repo and/or flathub.
>RHEL 9
sudo subscription-manager repos --enable codeready-builder-for-rhel-9-$(arch)-rpms
sudo dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-9.noarch.rpm -y
>RHEL 10
sudo subscription-manager repos --enable codeready-builder-for-rhel-10-$(arch)-rpms
sudo dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-10.noarch.rpm -y
Remeber EPEL are just additional packages, you would need to add another repo or log in to keep on updating RHEL's, like Remi repo https://rpms.remirepo.net/enterprise/10/