Please follow the below mentioned steps to download the all customers reports in mobile.
Step 1 - Kindly click on reports.
Step 2 - Click on party reports >> Click on all customers.
Step 3 - Click on manage manage columns to select the data which you wanted to show while downloading the reports >> Click on download Excel/PDF as per your requirements.
Note - Currently it is not possible at the moment to download all the customer reports with the particular date filter. We would request you to please check with the customer statement to download the reports with the date filter.