(Similar, but not identical (rpm -V reports no problems) to Reinstalling packages with missing/corrupt files)
I didn't pay attention and some RPM packages were installed with option --excludedocs in SLES 15 SP2 by mistake (actually rpm.install.excludedocs=yes was set in /etc/zypp/zypp.conf).
As a consequence manual pages are missing.
Now rpm -q -s pkg reports some files as not installed, and I wonder whether there is a command that adds just the missing docs for a package, specifically not overwriting any configurations files that might have been modified.
Something like the non-existing rpm -U --force --docsonly|--justdocs pkg.