This feature is not available in the free version of Dynamic Visibility for Elementor but only in the paid version: Dynamic Content for Elementor.
This trigger is available only if you are using the plugin My FastApp. You can retrieve more information about the features of this plugin on the official site.
On the triggers list on Dynamic Visibility, you can choose My FastAPP.
Now you have the new settings called My FastAPP
You can choose if you want to show/hide the current element:
on the site or in the app
only on the site
only in the app