pg_file_settings

Hi,
When I read the docs for pg_file_settings view on pg_file_settings
<https://www.postgresql.org/docs/current/view-pg-file-settings.html>

.... This view is helpful for checking whether planned changes in the
configuration files will work, or for diagnosing a previous failure. Note
that this view reports on the current contents of the files, not on what
was last applied by the server. (The pg_settings view is usually sufficient
to determine that.)

But the following test shows the opposite. When the parameter value is "on"
for *log_connections, *there is *no error for value*, which is the expected
case. But If I change the value in postgresql.conf to *"dummy"* then re-run
the query, this time *I expected the error column to show error*,* but
again it is null, *which means, I potentially apply this value to the
parameter.

Is there something I am missing?

Client and server is 16.1 from the RPM package.

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