2021 Enfold Theme Solution: 6-Columns in Footer

if you are working with a child-theme add this to your child-theme functions.php:
it will work without any other changings – because in footer.php there is allready a case 6: ;)

function my_avf_option_page_data_change_elements( array $avia_elements = array() ){
  /*** Example: Customize "Footer Columns Count" array*/
  $slug = "footer";
  $id   = 'footer_columns';
  $index = -1;
  /** Find index of element to change*/
  foreach( $avia_elements as $key => $element ){
    if( isset( $element['id'] ) &&  ( $element['id'] == $id ) && isset( $element['slug'] ) && ( $element['slug'] == $slug ) ){
      $index = $key;
      break;
    }
  }
  
  /** * If key not found, return unmodified array*/
  if( $index < 0 ){ return $avia_elements;}
  
  /*** Make your customizations*/ 
  $avia_elements[ $index ]['subtype'] = array(
            __('1', 'avia_framework') =>'1',
            __('2', 'avia_framework') =>'2',
            __('3', 'avia_framework') =>'3',
            __('4', 'avia_framework') =>'4',
            __('5', 'avia_framework') =>'5',
            __('6', 'avia_framework') =>'6'
          );
  return $avia_elements;
}
add_filter( 'avf_option_page_data_init', 'my_avf_option_page_data_change_elements', 10, 1 );

maybe 6 columns break to one column is a bad responsive behavior – so go and flex the layout for it f.e.:
in quick css:

#footer .container {
  display: flex;
  flex-flow: row wrap;
  justify-content: space-between;
}

#footer .flex_column {
  width: unset !important;
  flex: 0 1 14%;
  margin-left: 0;
}

@media only screen and (max-width:1249px) {
	#footer .flex_column {
	  width: unset !important;
	  flex: 0 1 30%;
	}
}

@media only screen and (max-width:989px) {
	#footer .flex_column {
	  width: unset !important;
	  flex: 0 1 50%;
	}
}

@media only screen and (max-width:767px) {
	#footer .flex_column {
	  width: unset !important;
	  flex: 0 1 100%;
	}
}