Hi QUB,
Thanks for contacting Syncfusion support.
Yes, it is possible to have combination of two chart types in our Report Designer. You can achieve this with the following steps.
1. Add two values field to the chart report item.
2. Select each series in the design view of the chart that need to be modified.
3. Set different chart type to selected series using the property window. Please refer the below attached snap.
We have also prepared a simple RDL report based on your requirement and it can be downloaded from the following location.
Regards,
Vinoth S.