If you want to show only the posts that have a true/false checkbox checked (the checkbox that trigger the two other field on your backend).
you should restrict to these posts directly on your query
'meta_query' => array( 'post_type' => 'areas-of-focus', array( 'key' => 'is_a_featured_area_of_focus', 'value' => '1', 'compare' => '==' ) )
something like that should return only the posts that have the
is_a_featured_area_of_focus field set to true.
so you can get rid of
if( get_field('is_a_featured_area_of_focus') ) : and other stuff related to checking if this field is checked on the loop and just take care of the layout.
let me know how that goes
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