Hi, menu with amp links have no sense because at this time amp is only for posts. Best what you can do is connection between pages.
You can do this using:
prev:
<a href="<?php echo get_permalink(get_adjacent_post(false,'',false)); ?>/amp" class="left">
<?php $url = wp_get_attachment_image_src( get_post_thumbnail_id(get_adjacent_post(false,'',false)), '50x50' );
echo '<amp-img src="'.$url[0].$url[1].$url[2].'" alt="Tania strona internetowa" width="50" height="50"></amp-img> '; ?>
<span><?php echo get_the_title( get_adjacent_post(false,'',false) ); ?> </span></a>
next:
<a href="<?php echo get_permalink(get_adjacent_post(false,'',true)); ?>/amp" class="right">
<?php $url = wp_get_attachment_image_src( get_post_thumbnail_id(get_adjacent_post(false,'',true)), '50x50' );
echo '<amp-img src="'.$url[0].$url[1].$url[2].'" alt="Tania strona internetowa" width="50" height="50"></amp-img> '; ?>
<span><?php echo get_the_title( get_adjacent_post(false,'',true) ); ?> </span></a>
Working demo: https://apjoo.com/portfolio/renovate-2/amp