I examined the log of the latest rpm: https://build.opensuse.org/public/build/Kernel:stable:Backport/standard/x86_64/kernel-default/_log when the rpm is build there are about 24423 provided ksym symbols but later after the modules are signed there are only 13536 ksym symbols in the final rpm (you can see that with: grep 'Provides: kernel ' <logfile>) between the 10887 ksym disappeared, there are the one needed by the kmp rpms. I hope with such information you can figure out how to solve the issue.