It should be known (discussed already several times) that when you have NVIDIA hardware in your system, two additional packages get installed:
openSUSE-repos-Leap
openSUSE-repos-Leap-NVIDIA
(for other openSUSE flavors the package naming is matching the flavor name e.g. openSUSE-repos-Tumbleweed)
These two packages provide services which adds the CDN repos. This is meant to make repo managemnt easier. A lot of times users had missing or wrong repos. The services make sure that you always have a valid set of repo URLs.
In rare cases it can happen that you end with two sets of valid repos (like the TO). One set provided from the services, one set provided by the initial installer.
So the TO did not add them manualy.
Beginners (or users which don’t know about the services) should use the URLs/repos provided by the services as it is harder to bork them. Users with a little bit more experience might remove the service packages and can use custom/self managed repos.