On 28/09/2021 19:53, Ondrej Mosnacek wrote:

For sharing SELinux labels over NFS you need to export the directory
with the "security_label" option on the server side. For example, if I
wanted to export a directory for testing purposes, I would do:

exportfs -o rw,security_label localhost:/path/to/dir

I guess in your case you probably have the export configured in
/etc/exports - in that case you need to add the "security_label"
option in that file.

That was it. Thanks much.

And with that bit of knowledge I found that had I read "man 5 exports" I may have
found it on my own.