Thanks for contacting Syncfusion support.
We were unable to reproduce the reported issue, “Resource data are not displayed in month view” at our end. We have prepared the sample to meet your requirement which can be downloaded from the following location
In the above sample, initially resource collections are given in the controller side. When the scheduler loads, the appointments will be render with the corresponding resource in all views.
Note: If we misunderstood your requirement kindly get back to us with more information such as code example/sample, if possible,to analyze those scenarios and provide a possible solution.