The setup would be to install and activate the plugin. You are using the same field group and therefore the same field with the same name on both post types. My plugin will automatically do the work of creating the two way relationship on this field without any additional work.
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ACF PRO’s Flexible Content field allows you to create smaller pieces of UI and compose them into whole flexible patterns. In our latest article, we show how to use it to create swappable site sections and integrate it all in a theme.https://t.co/ZRocH8oJSp