it is possible to do incremental refresh with a custom connector in Power BI. The custom connector should support incremental refresh by providing the necessary information such as the range start and end values, so that Power BI can determine which data to retrieve during the refresh operation.
To implement incremental refresh with a custom connector, you would need to add the appropriate logic in your connector code to retrieve the necessary data based on the provided range start and end values.
For example, if your custom connector is using an API to retrieve data, you would need to add parameters to the API call to specify the range of data to retrieve based on the provided range start and end values. The API should return only the data that falls within the specified range, which will then be used for the incremental refresh in Power BI.