I know these are dist-specific issues, but it seems far easier on linux dists to end up with an installed program (from rmp/debs) and still don't have the manpages, OR, getting a dud manpage that tells you to run "info gnufrotzomatic" and then you run that and since there were no info pages, info will very helpfully tell you to run itself again, since it shows a manpage if the info page is missing.
Semi-recent Centos7:
$ which find
/usr/bin/find
$ rpm -q --whatprovides '/usr/bin/find'
findutils-4.5.11-6.el7.x86_64
$ man find
No manual entry for find
$ more /etc/redhat-release
CentOS Linux release 7.7.1908 (Core)
So it claims to have the findutils rpm installed, which comes with manpages (especially since there is no find-man rpm) but I didn't get them for reasons. You just don't get that kind of experience on BSDs unless you very deliberately unmark manpages for installations. (which could be some kind of usecase, sure)
That's very strange. Probably centos is stripping "docfiles" from the installation (maybe a "container-optimized" install?). You can see which files are marked as documentation with "rpm -qd findutils". On my rhel 7, the man page is packaged along with findutils and I do see it.
Semi-recent Centos7:
$ which find
/usr/bin/find
$ rpm -q --whatprovides '/usr/bin/find'
findutils-4.5.11-6.el7.x86_64
$ man find
No manual entry for find
$ more /etc/redhat-release
CentOS Linux release 7.7.1908 (Core)
So it claims to have the findutils rpm installed, which comes with manpages (especially since there is no find-man rpm) but I didn't get them for reasons. You just don't get that kind of experience on BSDs unless you very deliberately unmark manpages for installations. (which could be some kind of usecase, sure)