Hi,
The issue is, that the content is in a repeater/flexible field, not within the post content.
The good news is, that I have installed the beta version of the next release, which has a solution for indexing the repeater field contents pretty accurately. After installing I have selected the field home_page_builder field only, and reindexed, which now shows a lot more keywords.
If you try searching items from the page content, then it hopefully almost all keywords should be identified.