Thank you for your message.
Could you please clarify if you mean that you see both remote monitors displayed on only one of the monitors on the Viewer's side? If this is the case, then, unfortunately, there no such feature yet that allows to automatically map multiple screens on the Host's side to multiple monitors on the Viewer's side respectively. However, we already have this feature on our wishlist and we will definitely implement it in our future updates.
Meanwhile, as a temporary workaround for this scenario, it should be possible to manually stretch the Full Control and View window across both monitors or to do so via your graphics card control panel, such as Nvidia Control Panel or AMD Control Center (depending on your graphics card manufacturer).
Hope that helps.