When generating a BPMN2 Process model, there are some configuration properties that will guide how the process is generated.

Select the source model (e.g. a BPMN2 Choreography) and select the Properties item from the menu:

This will display the properties dialog, from which the Savara->BPMN2 node can be selected:

The default (false) is to generate ServiceTask nodes when a client role is invoking a service role (e.g. RPC style). If the value is set to true, then individual SendTask and ReceiveTask nodes are generated.