@epsilonadmin custom block.
Here is info how to create block - https://www.advancedcustomfields.com/blog/acf-5-8-introducing-acf-blocks-for-gutenberg/
So we register new block, assigned fields for this block.
We add block on page. When I try to search phrase from one of these field - page not added to search result
Search Field is displaying pre-populated options
Should be you are using the "WPFTS :: Live Search" widget. This widget is intended to show this live search data. If you don't want them, simply use the native WP Search widget.
Hope it helps.