Click counter

I am trying a link management plugin, I've got my redirect working but I am trying to have another metabox as a click counter but I can't seem to make it count, here my function and metabox code.

/*Metabox*/
<?php
add_filter( 'rwmb_meta_boxes', 'amp_link_register_meta_boxes' );
function amp_link_register_meta_boxes( $meta_boxes ) {
    $meta_boxes[] = array (
      'id' => 'link-box',
      'title' => 'link box',
      'pages' =>   array (
         'link',
      ),
      'context' => 'normal',
      'priority' => 'high',
      'autosave' => true,
      'fields' =>   array (
         
        array (
          'id' => 'link_url',
          'type' => 'url',
          'name' => 'Link Url',
          'placeholder' => 'Enter destination url',
        ),
         
        array (
          'id' => 'link_counter',
          'type' => 'text',
          'name' => 'Counter',
        ),
      ),
    );

    return $meta_boxes;
}

/* redirect and count function */

function links_amp_redirect() {
    if( is_singular( 'link' ) ) {
        $count = rwmb_meta('link_counter', get_the_ID() );
        $count++;
        update_post_meta( 'link_counter', $count, get_the_ID() );
        wp_redirect( rwmb_meta( 'link_url', get_the_ID() ) );
        exit();
    }
}

add_action( 'template_redirect', 'links_amp_redirect' );