Add Favicon in CMS mode (Episerver 9)

Hi,

Is it possible to add Favicon in CMS mode in Episerver 9?

I found this answer https://world.episerver.com/forum/developer-forum/-Episerver-75-CMS/Thread-Container/2019/2/favicon-in-edit--admin-mode/ but it shows how to replace an existing favicon.

In our case there is no favicon displayed at all.

Thanks.