This Tutorial shows that there are many ways how to create a sitemap for your Tiki.

Some of them below:
{maketoc title="" levels="2,3"}

1.1.1. Using Menu Module

Using Custom CSS To Override The Collapsed Menu Display

This code:

{HTML()}
<style>
.mysitemap .cssmenu_vert li ul {
	display: block !important;
	position: static !important;
	}
</style>
{HTML}
{module module="menu" id="43" bootstrap="n" class="mysitemap" setSelected="n" title="Sitemap"}

Produces:

1.1.2. Using toc from a structure

If you use a menu fom a structure of wiki pages, you can use

{toc}

to produce the table of contents of that site.