Get Post Modified Date Format

To change the modified date format output on single blog post header styles meta (all styles except for the Default style), you can use the ocean_get_post_modified_date_format filter hook.

add_filter( 'ocean_get_post_modified_date_format', 'my_get_post_modified_date_format' );
function my_get_post_modified_date_format() {

    $output = 'Y/m/d';

    return $output;
}

Adjust the $output value accordingly.