@siddler If you prefer to do it this way around, you’re better off with Structured Data disabled and manually retrieving the current hours from Google Business (i.e. press the button).
I have made the plugin fully mobile-friendly (including the Dashboard) so you can easily login through your phone and perform updates in the WordPress dashboard and this will propagate through Structured Data. I don’t think Facebook supports Structured Data though, so there’s no perfect way around your current setup.
In a pre-launch version of the plugin, I did have the synchronization automated from Google Business, but I realized that this may compound incorrect data if both this and Structured Data was enabled. I may re-add this functionality in a future version as an additional feature, but insisting that either Structured Data or Google Business synchronization is enabled but not both. I’m not looking into Facebook at this time, but I may check if this is viable as part of the development process.
Anyway for the moment, please use this information to inform yourself of the best option for you.
All the best,
Noah