Here is what worked for the logic of showing updated post date and time if post is updated and if not just show published date and time for WORDPRESS
<?php $u_time = get_the_time('U');
$u_modified_time = get_the_modified_time('U');
if ($u_modified_time >= $u_time + 86400) {
echo " [UPDATED] ";
the_modified_time('F j, Y');
echo " at ";
the_modified_time(); }
else {
echo get_the_date(); echo " at "; echo the_modified_time(); echo " EST";
}
?>
So anyone looking to implement this on their wordpress website. go for it!!!
Solved it myself after hours of back and forth