Comment # 26 on bug 1195313 from Filip Kadlec

Strange. I was able to mount the bootable USB flash disk at last. Changing
directory to x86_64, I found there the file kmod-28-2... .rpm. Running (as
root)
zypper install kmod within that directory yields:

(many complaints about non-accessible repositories)...
'kmod' is already installed.
Package 'kmod' is not available in your repositories. Cannot reinstall ...
Resolving package dependencies.
Nothing to do.

Nevertheless, when I mount the usb stick with the kernel rpm, running
zypper install kernel-default-5.16.... rpm

still yields the conflict with missing 'kmod-zstd'. It seems to me that 'zstd'
is not provided by the 'kmod'.