Here's how to create website menus in Odoo that link to controller routes. This approach uses XML to define the menu structure and Python to handle the route logic. To add website menus in Odoo that link to controller routes, you need to define them in XML using the 'website.menu' model and then create corresponding controller routes in Python.

The XML defines the menu's name, URL, parent menu, and sequence, while the Python code handles the logic for each route. Menus are declared using the 'website.menu' model in XML.
Each menu item specifies: 

name - Text displayed on the website navigation bar
url - pointing to a controller route
parent_id - for hierarchy
sequence - for ordering among menus. 

Adding Menus in an Example Module

      Page One

      /example/page1

      Page Two

      /example/page2

      Page Three

      /example/page3

Controller Example for Menus

from odoo import http
from odoo.http import request

class ExampleModule(http.Controller):
​@http.route('/example/page1', type='http', auth='public', website=True)
  ​def page_one(self, **kw): 
  ​ ​return request.render('example_module.page1_template')

  ​@http.route('/example/page2', type='http', auth='public', website=True)
  ​def page_two(self, **kw): 
  ​ ​return request.render('example_module.page2_template')

  ​@http.route('/example/page3', type='http', auth='public', website=True)
  ​def page_three(self, **kw):
  ​ ​return request.render('example_module.page3_template')