[ acf_wys1] in functions.php 
function wys1_shortcode (){
    global $ post;
    $ acf_wys1 = get_post_meta( $ post->ID, 'acf_wys1', true );
    return $ acf_wys1;
}
add_shortcode( ' acf_wys1', ' wys1_shortcode' ); 

BeaverB [ featured id='...' my_field='acf_...'] in functions.php
function gg_get_field($attr){
    $args = shortcode_atts( array(     
            'id' => '1',
            'my_field' => 'featured'
        ), $attr );
 
    return get_field($args['my_field'], $args['id']);
}
add_shortcode( 'featured' , 'gg_get_field' );

PHP code to get a custom field from a specific post   
‹?php the_field('acf_excerpt', $post_id); ?› 

[ Insert-remote-post-ACF-fields-xyz]
< ?php query_posts('showposts=2'); ? > 
< ?php while (have_posts()) : the_post(); ? > 
[ su_spoiler title="   " open="no" style="fancy;" icon="folder-2" anchor_in_url="no"]
< ?php the_id(); ? >
< ?php the_field('acf_excerpt', $post_id); ? >
< ?php endwhile; ? > 

//WP recommend never to use query_posts
// Shortcodes enabled in Custom Fields: functions.php (field by field)
echo do_shortcode(get_post_meta(get_the_ID(), "MyCustomField", true));
//Check > do_action_ref_array( 'pre_get_posts', WP_Query $query )
//Note: a text field is plain text, therefore it can be directly utilized in php, which is what get_field() is for, rather than the_field() that wraps the data into its own echo function so it’s simply do_shortcode( get_field('name') );
of course the best practice in case there’s no data and if there’s extra html around it is to check if it exists first. ACF docs

if ( get_field('name') ) {
	echo do_shortcode( get_field('name') );   }

add_filter(‘acf/format_value/type=text’, ‘do_shortcode’);

DRAFTS from doc examples TBD? 
get_fields([ $post_id], [ $format_value]);
$post_id (mixed) (Optional) The post ID where the value is saved. Defaults to the current post.
$format_value (bool) (Optional) Whether to apply formatting logic. Defaults to true.

[ xyz-ics snippet="addacf" acf_name"acf_txt1"] ··· [ xyz-ics snippet="addacf" acf_name"acf_txt1"] 
[ xyz-ics snippet='addacf' acf_name'acf_excerpt'] ··· [ xyz-ics snippet="addacf" acf_name"acf_txt1"]

PHP code to get a custom field from a post
function related_post_acf_shortcode( $atts ) {
  // extract attributs
  extract( shortcode_atts( array(
    'field'      => '',
    'related_field' => '',
    'post_id'    => false,
    'format_value'  => true
  ), $atts ) );
  // get unformatted value of post object field
  $related_post_id = get_field($field, $post_id, false);
  // get value from the related post and return int
  $value = get_field( $related_field, $related_post_id, $format_value);
  // array
  if( is_array($value) ) {
    $value = @implode( ', ', $value );
  }
  // return
  return $value;
}
add_shortcode('related_post_acf', 'related_post_acf_shortcode');

/*  shortcode
  [related_post_acf field="post_object_field_name" related_field="field_name_on_other_post"]
*/