For post object fields, would it be possible to pre-load all available post <options>
into the <select>
rather than waiting until the user searches for something?
That would speed up the process of finding something, rather than waiting on an AJAX trip to the server, query, and response.
You can use this filter https://www.advancedcustomfields.com/resources/acf-fields-post_object-query/ to set posts_per_page to -1.
If you have a lot of post objects on our site this will likely time out, which is one of the reasons I think that it’s not pre-populated.