In the credit view, the "Paid" detail column will not show the data because the column is spelled wrong on the code.
In your calss-aworewards-admin-class-credit::column_paid, you reference the column $row->payment_ids (twice) but the actual column name is $row->payment_id (without s)
In your calss-aworewards-admin-class-credit::column_paid, you reference the column $row->payment_ids (twice) but the actual column name is $row->payment_id (without s)