Renders the `core/comments-pagination-next` block on the server.

function render_block_core_comments_pagination_next( $attributes, $content, $block ) {
	// Bail out early if the post ID is not set for some reason.
	if ( empty( $block->context['postId'] ) ) {
		return '';
	}

	$comment_vars     = build_comment_query_vars_from_block( $block );
	$max_page         = ( new WP_Comment_Query( $comment_vars ) )->max_num_pages;
	$default_label    = __( 'Newer Comments' );
	$label            = isset( $attributes['label'] ) && ! empty( $attributes['label'] ) ? $attributes['label'] : $default_label;
	$pagination_arrow = get_comments_pagination_arrow( $block, 'next' );

	$filter_link_attributes = function() {
		return get_block_wrapper_attributes();
	};
	add_filter( 'next_comments_link_attributes', $filter_link_attributes );

	if ( $pagination_arrow ) {
		$label .= $pagination_arrow;
	}

	$next_comments_link = get_next_comments_link( $label, $max_page );

	remove_filter( 'next_posts_link_attributes', $filter_link_attributes );

	if ( ! isset( $next_comments_link ) ) {
		return '';
	}
	return $next_comments_link;
}