Hi,

First, initialise a route

controller.py

@http.route('/web/redirect', type='http', auth="user")
    def function_name(self, job, **kwargs):
    country = request.env['res.country'].sudo().search([])
    return request.render("external-id of template", {
            'country': country,
        })

XML:

<label style="width: 200px" for="country">

         <span class="s_website_form_label_content">Country </span>

  </label>

  <div class="col-sm">

      <select id="country"

         name="country_id"

         class="form-control s_website_form_input">

         <option value="">Country</option>

         <t t-foreach="country" t-as="country">

             <option t-esc="country.name" t-att-value="country.id"/> </t>

      </select>

  </div>

Regards