In the owner manual, it states that data is transferred to Bosch when the eBike is connected to the Bosch DiagnosticTool. Why is that and to which Bosch products does this apply?

The professional DiagnosticTool allows the retailer to read all the important information from your eBike, troubleshoot problems and update your eBike with software updates, as well as make certain limited individual adjustments on your behalf. The data that can be downloaded from the drive unit, rechargeable battery and other components helps us to improve our service in the future and enable our products to always be better adapted to the requirements of eBikers.