Explanation:
Timeline Description automatically generated with low confidence

Step 1: Export the custom view to an Excel dynamic pivot table
You can export app data to an Office Excel PivotTable to see patterns and trends in data. An Excel PivotTable is a great way to summarize, analyze, explore, and present your app data.
Step 2: Create a pivot table, and then use the Phone Rep field as a category and the Phone call Duration in Minutes as field as series Step 3: Set the formula for phone call duration in minutes to Average and add a pie chart linked to the pivot table Step 4: Save the spreadsheet and upload it back to the system.
Reference:
https://docs.microsoft.com/en-us/powerapps/user/export-excel-pivottable