Hi Konstantin,
Thank you for contacting Syncfusion Support.
Our current Dashboard architecture works based on Server or Live mode. We do not have support to combine or merge two tables from two different servers. To achieve this, we have to extract data from those servers and handle it in the Client mode. Meanwhile, we don’t have any immediate plans to support this feature and we will consider the same in any of our future releases.
Regards,
Umapathy S.