Foreman Katello server

Successfully registered Fedora based distros, RHEL - CenOS - etc. to Foreman Katello.
Having issues when trying to register a Target debian 12 machine or Ubuntu 20.04 focal to the Foreman Katello server, which is an upstream server and has been connected to the distro mirrors and have the repos pulled and available.
Need to patch the debian based distros via remote execution and also through Katello agent.