Is it supported can be used in angular metronic
The URL you referring to is for the HTML version of Metronic and it can not be used as it is for the Angular version of the older Metronic v7 theme.
As you can check here the full calendar plugin has Angular support and you can use it in Metronic Angular App by integrating it by yourself. At the moment we do not have the Fullcalendar usage demo in Metronic. We can point you out.
If you need any further help please let us know, which Metronic version and demo you are using.