Description of problem:
https://fedoraproject.org/wiki/EPEL instructs users to activate the PowerTools repository is running CentOS 8 with the following command.
# dnf config-manager --set-enabled PowerTools

The repository name appears to be case sensitive and only worked by entering
# dnf config-manager --set-enabled powertools

Version-Release number of selected component (if applicable):
CentOS 8 Stream

How reproducible:
Very.

Steps to Reproduce:
1.  Install CentOS 8 Stream
2.  Install EPEL repo RPM with
    # yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
3. Attempt to activate the PowerTools repository with
   # dnf config-manager --set-enabled PowerTools
  
Actual results:
# dnf config-manager --set-enabled PowerTools
Error: No matching repo to modify: PowerTools.

Expected results:
# dnf config-manager --set-enabled powertools
#

Additional info:
Should platform matter for reproducibility, this is on a Fedora 33 host using KVM and provisioning CentOS 8 Stream through Cockpit.