Create a chart with the last 30 days as the X axis, and a count of different date fields as the Y axis

You will need to have a child table driven by Automations to log all the status changes and then chart those.

The only way to get every single day to list would be to have a dummy record for each date preloaded via Excel.  One trick is to load those with a "value" field of zero, but have the real ones load with a value of 1.

Then,  instead of counting the # of Statuses for that day on the chart count their "Value".  The dummy ones have no value and will be flat lined on the x axis.  :)