How to make WPQuery custom post type work in Twig / Timber


Im totally new to Twig and Timber. I was reading their doc and watch some tutorials however I cannot get it to work.

I have this WP Query with custom post type and ACF field:

    <?php           $  args = array( 'post_type' => 'what_our_clients_say', 'posts_per_page' => 2 );           $  loop = new WP_Query( $  args );           while ( $  loop->have_posts() ) : $  loop->the_post();               echo '<div class="what-our-client-say-single-wrapper p-relative aos-init aos-animate" data-aos="fade-up" data-aos-delay="100">';               echo '<div class="what-our-client-say-single-wrapper-violet"></div>';                 echo '<div class="what-our-client-say-inner-wrapper p-relative">';                 echo '<div class="what-our-client-say-inner-wrapper-img"><img src="' . get_field('what_our_clients_img') . '" class="img-client img-fluid"></div>';                 echo '<div class="what-our-client-say-inner-wrapper-all-txt"><div  class="what-our-client-say-inner-wrapper-header"><h3>'.get_the_title().'</h3></div>';                 echo '<div class="what-our-client-say-inner-wrapper-txt"><p>'.  get_the_excerpt() .'</p></div><div class="what-our-client-say-inner-wrapper-who"><p>'. get_field("what_our_clients_say_who") .'</p></div>';                 echo '</div></div><a href="https://pragmaticbrains.com/case-study" target="_blank" class="button big primary-colorbg no-hover what-our-client-say-special-btn">READ MORE';                 echo '</a>';               echo '</div>';           endwhile;           wp_reset_postdata();        ?> 

And when I pass it to php file it works. However when I try to make it work in .twig file it doesn”t. My main problem is not with fields or excerpt / title parts (which I convert to: {{ post.title }} but with this loop:

 $  args = array( 'post_type' => 'what_our_clients_say', 'posts_per_page' => 2 );           $  loop = new WP_Query( $  args );           while ( $  loop->have_posts() ) : $  loop->the_post(); (...)    endwhile;           wp_reset_postdata();   

part. I would be very grateful for your help