Links not showing in left sidebar

Installation
1

I’m trying to add the Apps and Devices & services panels to the left side bar while using them frequently.

This is the code in configuration.yaml:

panel_custom:
  - name: devices-panel
    sidebar_title: Devices & Services
    sidebar_icon: mdi:devices
    url_path: config/integrations/dashboard
    embed_iframe: true
  - name: apps-panel
    sidebar_title: Apps
    sidebar_icon: mdi:apps
    url_path: config/apps/installed
    embed_iframe: true

However, there is nothing showing up in the sidebar. Any idea why this is not working?
Using 2026.2

2

Did you restart Home Assistant?

If you already restarted, try with this configuration that @Sir_Goodenough has shared.