While linking some content I read some things that aren't quite right, but I don't have time to dive into it now so capturing them here.

https://docs.theforeman.org/nightly/Managing_Content/index-katello.html#Adding_Custom_RPM_Repositories_for_Oracle_Linux_9_content-management states:

Foreman EL9 Client
Upstream URL: Foreman Clientel9/x86_64/

Note part of it is a link, but that really makes it hard for users.

https://docs.theforeman.org/nightly/Managing_Content/index-katello.html#best-practices-for-patching-content-hosts_content-management states:

Registering hosts to Foreman requires Foreman Client, which contains the subscription-manager package, katello-host-tools package, and their dependencies. For more information, see Registering hosts in Managing hosts.

That repository doesn't contain subscription-manager.

https://docs.theforeman.org/nightly/Managing_Hosts/index-katello.html#converting-a-host-to-rhel_managing-hosts states:

The utility also subscribes the host to Foreman community Subscription Management.

There is no Foreman community Subscription Management. This looks like a wrong usage of {Team}.