There are a lot of plugins that add fields to that list. Many plugins use field names that start with an underscore which hides them from that list. I think this was suggested for ACF, but it would seriously effect backwards compatibility and would likely be a nightmare to include a way to update from the current names to new names if it were to change. I’m not the developer so I can’t say what’s involved.
If the custom field meta box is not something you want the client to see you can remove it. https://codex.wordpress.org/Function_Reference/remove_meta_box
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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— Advanced Custom Fields (@wp_acf) January 24, 2023
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