From Fedora Project Wiki

This command line is problematic:

koji list-builds --package=kernel --after="2022-10-16" | grep "6.00"

The kernel can be released earlier than October 16, in which case it won't be visible.

"6.00" is not likely to match the package name. The existing 6.0 kernels won't match, they are called kernel-6.0.0-54.eln121 and kernel-6.0.0-54.fc38

Suggested replacement:

koji list-builds --package=kernel --after="2022-10-12" | grep "6.0.0"