Package Repositories not listed in Software Package Updates

SYSTEM INFORMATION
OS type and version Ubuntu Linux 24.04.1 (AWS Lightsale)
Webmin version 2.202

This happened for me after upgrading to Ubuntu 24.
I don’t have any repository listed in the Package Repositories, while there are several repositories present and enabled in the sources.list.d directory.
I tried to delete the old repositories and reinstall them in the directory, and also reinstalled webmin.
See the images below.
Any ideas?

And By the way, any suggestions for missing repositories?