Postal code in search

Hi ,

I need to add the postal code/zip code option in the event search manager, How can i do it?
There is no such option in the latest version of this event manager.

And we are using multi-sites in our project, there is a centeralized search in the main site, but we need to filter the events using selection of other child sites and postal/zipcode in the main site search

https://wordpress.org/plugins/events-manager/