loop wordpress Posts NOT in index , in another template - php

Question

did read alot on stackoverflow and wordpress documentation but nothing works
iam using newest WP version
i createt a template named contact.php
<?php
/*
* Template Name: Contact Template
* description: >-
Page template
*/
get_header();
?>
everything works , you can choose the template in wp admin dashboard when creating a new site
but the post loop dosent work. only on the index.php
this code i use in index. works fine. if i copy over to my template it will not load the posts
<?php if (have_posts()) : ?>
<?php while (have_posts()) : the_post(); ?>
<div class="col-12 mt-4 mb-4 justify-content-center text-center">
<a href="">
<h1><a href="<?php the_permalink(); ?>">
<?php the_title(); ?> </a></h1>
</a>
<hr>
<p> <?php the_excerpt(); ?> <br> </p>
<style>
img {
height: 200px;
width: 200px;
border-radius: 20%;
}
</style>
<?php if (has_post_thumbnail()) : ?>
<?php the_post_thumbnail(); ?>
<?php endif; ?><br>
<p> <?php the_author(); ?> <?php the_date(); ?><br> </p>
<p></p>
</div>
<?php endwhile; ?>
<!--end the while loop-->
<?php else : ?>
<!-- if no posts are found then: -->
<p>No posts found</p> <!-- no posts found displayed -->
<?php endif; ?>
<!-- end if -->
</div>

Answer 1

Actually when you create a new template into Wordpress theme folder directory you should copy from the one that is used from your template to render the post list.
As you can see here from wordpress documentation index.php is just the deepest level wordpress reach if it doesn't find any other suitable template.
If you are unsure of what template to use i suggest you to install query monitor and see from the wpadmin top bar in your frontend which is the template for a standard post loop page.
If you copied from the correct template there should be no standard reason of why that should fail. If it doesn't work for you what i can suggest is to see if the problem still happens with default template (like twentytwenty) or disabling all your plugins.