Multi-level Navigation menu - can't find it

Hey all. We are using the COmmunity cloud with Stella theme and we would like to use the new Multi-Level Navigation Menu (https://help.salesforce.com/articleView?id=b2b_comm_lex_components_multilevel_navigation_menu.htm&type=5) but we are not able to add it as a component or to change the Theme navigation menu component to Multi-level menu. Any suggestion about what we can do?