Problem:
On this website, Beaver Builder was used for creating content, but when using Translate Everything, the content is not appearing on the automatically translated pages.
Solution:
The issue here was, that the website had not the String Translation plugin installed.
In order to translate Beaver Builder, you need to have the plugins String Translation and Media Translation installed.
Further, if you use layouts and templates you need to set the Beaver Builder Templates and Themer Layouts to translatable inside the WPML Settings page and translate those too, as explained in the documentation.