Panel_iframe.yaml - 1 icon not visible

Having this weird issue with only this recently added button in my panel_iframe. I have 1 of multpile which does not display the icon…:

Tis is my config in the yaml:

  adguard01:
    title: AdGuard Home 01
    icon: mdi:verified
    url: http://192.168.1.90

This is the result:
image

For all others I do no have this issue and all icons show properly. What can this be?

BTW: This is not the adguard addon, that works well. This is 2nd adguard installation on a seperate linux machine.

I can’t find any icon mdi:verified on mdi.

Based on this:
https://cdn.rawgit.com/james-fry/home-assistant-mdi/efd95d7a/home-assistant-mdi.html

Use the official MDI website:
https://materialdesignicons.com/

So for this example it would be:

adguard01:
    title: AdGuard Home 01
    icon: 'mdi:shield-check'
    url: http://192.168.1.90

I remember at some point reading something in release notes that the new mdi icons were/were not going to be used and at that time the link previously provided by me was the singe source of icons. is it no the case that all icons of your link will work in home assistant?

In other words:

Will all icons from https://materialdesignicons.com/ work in home assistant?