Fedora Core hasn't been a thing in decades, it's just Fedora or the Fedora Project now. CentOS Stream is ABI compatible with RHEL If you create a free Red Hat Developer account you can get 16 free RHEL licenses. So, yes you very much can run RHEL.

Edit: If you or anyone else is interested https://developers.redhat.com/articles/faqs-no-cost-red-hat-enterprise-linux