How to output value/separator for multiple (inc taxonomy) fields when not using full or value wrapper in WP Job Manager Field Editor

functions.php

<?php

/**
 * If you are using shortcode, or auto output and do not have the full AND value wrapper being output (output as value only),
 * you can use this code below to use something different than the regular <br /> that is output by default
 */

add_filter('field_editor_output_no_wrap_after', 'smyles_custom_no_wrap_after', 10, 6);

function smyles_custom_no_wrap_after( $output, $meta_key, $listing_id, $field_values, $args, $single_value ){
  
  // Array indexes start at 0, to get the last we need to minus 1 from total
  $last_value_index = ( count( $field_values ) - 1 );
  // Get where our current value output is at
  $current_index = array_search( $single_value, $field_values);
  
  // Return empty string if this is the last value
  if( $last_value_index === $current_index ){
	return '';	
  }
  
  // Return ", and " for second to last value
  if( $current_index === ( $last_value_index -1 ) ){
	return ', and ';
  }
  
  // Return comma instead of <br /> for "job_region" meta key
  if( $meta_key === 'job_region' ){
	return ', ';
  }
  
  // OR check for taxonomy and output comma
  if( array_key_exists( 'taxonomy', $args ) && $args['taxonomy'] === 'job_listing_region' ){
	return ', ';
  }
  
  return $output;
}

One thing to mention as well:
You MUST disable FULL and VALUE wrappers for this to work! --- you CAN enable the value wrapper and output though

If you plan on outputting values as CSV you can not use HTML element wrappers as your theme would cause the display to look incorrect.