Idea Summary
fullCalendar6 has a view called “multiMonthYear”. Make this a declarative option.  

Workaround

Currently we can enable that view using the advanced javascript section, for example like this:

 function (config) {
   config.endDateExclusive = false;
   config.headerToolbar.end = "";
   config.initialView = 'multiMonthYear';
   
   config.headerToolbar.left = 'prev,next today';
   config.headerToolbar.center = 'title';
   config.headerToolbar.right = 'multiMonthYear';
   config.multiMonthMaxColumns = 3;

   return config;

}

Preferred Solution (Optional)
New checkbox in the “additional calender views” section. 

Also improve the help text for this section.