Icons usables : how to know ?

[lunarok]

Hi,

Thanks to your project, it was exactly what I was looking for after traefik, cf-companion, the auto-populated dashboard was the missing piece.

Now, I have read the doc, for icons to set, it's just redirect to : https://materialdesignicons.com/
But not all icons are workings, I have some failing, and I didn't find a reason (like with - in their name or not)

Is it supposed to be limited ?