You can have a “Warning” message at the bottom of the Relay Point selection map :

Warning carte choix point relais
Warning message on the relay point selection map

This means that the plugin uses the Mondial Relay test account, as shown on the next page of the documentation. : https://mondialrelay-wp.com/doc/utiliser-le-mode-test/

To switch to production mode, you need to configure the “Account” tab of the plugin with your own Mondial Relay identifiers, as indicated in the dedicated page of the documentation.: https://mondialrelay-wp.com/doc/connecter-le-plugin-a-votre-compte-mondial-relay/