Santiago told me to post in here my question or rather feature request. Can you add a Chart that is just an Aggregated Value of a Column or Slice?
Example the tours metric below is just a sum of the column tours. I would love to have a chart ux option to do the same in App sheet give a title and then just an aggregate of a column.
The next level would then be adding a sub comparison value based on a date column see photo two metric average happiness as an example. That way you could compare data from one week or one month to the next