I have those repos but I disabled the backports debug as they caused issues
They appeared after about 4 hours. Something in the mirror did not update every mirror in a timely manor. I see that too often - the Tumbleweed did that tonight and corrected after 30 minutes.
VM1:~ # zypper lr
Repository priorities are without effect. All enabled repositories share the same priority.
# | Alias | Name | Enabled | GPG Check | Refresh
---+-----------------------------+---------------------------------------------------------------------------------------------+---------+-----------+--------
1 | Packman | Packman 15.3 Repository | Yes | (r ) Yes | Yes
2 | X11_MATE_Current | MATE openSUSE_Leap_15.3 | No | ---- | ----
3 | adobe | adobe | No | ---- | ----
4 | brave-browser | brave-browser | Yes | (r ) Yes | No
5 | mozilla | mozilla | No | ---- | ----
6 | repo-backports-debug-update | Update repository with updates for openSUSE Leap debuginfo packages from openSUSE Backports | No | ---- | ----
7 | repo-backports-update | Update repository of openSUSE Backports | Yes | (r ) Yes | Yes
8 | repo-non-oss | openSUSE-Leap-15.3-Non-Oss | Yes | (r ) Yes | Yes
9 | repo-oss | openSUSE-Leap-15.3-Oss | Yes | (r ) Yes | Yes
10 | repo-sle-debug-update | Update repository with debuginfo for updates from SUSE Linux Enterprise 15 | No | ---- | ----
11 | repo-sle-update | Update repository with updates from SUSE Linux Enterprise 15 | Yes | (r ) Yes | Yes
12 | repo-update | openSUSE-Leap-15.3-Update | Yes | (r ) Yes | Yes
13 | repo-update-non-oss | Update Repository (Non-Oss) | Yes | (r ) Yes | Yes
14 | repo-virtualization | openSUSE-Leap-15.3-Virtualization | No | ---- | ----
15 | skype-stable | Skypeforlinux - stable | Yes | (r ) Yes | No
16 | teamviewer | TeamViewer - x86_64 | Yes | (r ) Yes | No
VM1:~ #