Unfortunately, there might be various factors why the sync is not working, but we would highly appreciate it if you could please make sure that you have done the following:
You can also try the debug options located on the 'iCloud' screen in the app. They will let you upload all of the data from your device to iCloud and fetch all of the data from iCloud to your device. You will also be able to see the debug logs that you can share with us for further assistance.
If you are still experiencing issues with the iCloud sync, please don't hesitate to contact us and we will do our best to help you further! You can always get in touch with us via an email at [email protected].