WPBakery is a WordPress third-party page builder, the flexmls IDX WordPress plugin has been compatible with WPBakery since version 3.10.
WPBakery features two page builder interfaces to edit pages and posts, Backend and Frontend editor. Frontend
Backend
In either one of the two interfaces you will find an Add Element button.
Click on FlexMLS and select a widget to apply to the page…
Or use the short-code option laid out here.
Please see our Widgets page for more information on each widget option.