I noticed this in kernel.spec

```
# This Requires is wrong, because the post/postun scripts have a
# test -x update-bootloader, having perl-Bootloader is not a hard requirement.
# But, there is no way to tell rpm or yast to schedule the installation
# of perl-Bootloader before kernel-binary.rpm if both are in the list of
# packages to install/update. Likewise, this is true for dracut.
# Need a perl-Bootloader with /usr/lib/bootloader/bootloader_entry
Requires(post): perl-Bootloader >= 0.4.15
```

Actually, RPM does support additional ordering hint. See https://rpm-packaging-guide.github.io/

The OrderWithRequires tag for supplying additional ordering hints has been added. The tag follows Requires tag syntax, but does not generate actual dependencies. The ordering hints are treated as if they were Requires when calculating the transaction order, only if the involved packages are present in the same transaction.

I am not sure whether zypper supports it though. The https://bugzilla.opensuse.org/show_bug.cgi?id=1187332 is rather confusing.