You need to do one of a few things.
The first is loop though the field twice.
If you use get_field('progress_barRepeater') this will return the entire acf field as a nested array, you could then loop though the rows of the array to get the values and then you can loop through them again to display each row.
You can capture the output of a single loop using an object buffer, creating html and collecting the information all at the same time. Then after the loop output the “average” and then the content of the object buffer.
