Error: No matching repo to modify: crb {Oracle Linux 9 / Rocky Linux 9}

Hello Team,

I have this challenge whenever I try to install the CRB repo on Oracle Linux 9 / Rocky Linux 9

My repolist looks like this:-

# dnf repolist
repo id repo name
ol9_UEKR7 Oracle Linux 9 UEK Release 7 (x86_64)
ol9_appstream Oracle Linux 9 Application Stream Packages (x86_64)
ol9_baseos_latest Oracle Linux 9 BaseOS Latest (x86_64)
ol9_developer_EPEL Oracle Linux 9 EPEL Packages for Development (x86_64)

I have installed the latest EPEL.
# dnf list installed | grep epel
oracle-epel-release-el9.x86_64 1.0-1.el9 @ol9_baseos_latest

Still, I have set my crypto-policies to DEFAULT

But every time I run the CRB command:
# dnf config-manager --enable crb
Error: No matching repo to modify: crb.

I get this error. This is the same case with my Rocky Linux 9 lab-machine.

Am trying to install KDE Desktop Environment on Oracle Linux 9, but this issue cant allow me to continue.

Please help.