Even if we had a variable, it would still be useless, since the default mod_status configuration only allows localhost to access the status page:
(via mods-enabled/status.conf:)
<Location /server-status>
    SetHandler server-status
    Order deny,allow
    Deny from all
    Allow from 127.0.0.1 ::1
#    Allow from 192.0.2.0/24
</Location>