functions.php

<?php

function prefix_add_site_icon_size( $sizes ) {
  $sizes[] = 152;
  return $sizes;
}
add_filter( 'site_icon_image_sizes', 'prefix_add_site_icon_size' );

function prefix_add_site_icon_tag( $meta_tags ) {
    $meta_tags[] = sprintf(
        '<link rel="icon" href="%s" sizes="152x152" />',
        esc_url( get_site_icon_url( null, 152 ) )
    );
    return $meta_tags;
}
add_filter( 'site_icon_meta_tags', 'prefix_add_site_icon_tag' );