Unable to change the data source from one environment to another and unable to use the measure/value filtering on Power BI Desktop while using a connector based on XMLA

We created a Power BI connector based on XMLA connectivity. We are able to connect and browse. However we are facing below two critical issues.

1. When we tried to change the data source from one environment to another it is not allowing. "Change Source..." is disabled which is under Data source settings and can't able to add any new data as "Get data" option is also disabled. Please provide or guide us how to switch the data sources or let us know if we miss anything in the code.

2. We are not able to apply Measure/value filtering.

Also, all the measure, KPIs are grouped into one folder called "Key Figures". Please help us here is there any property need to add to enable measure/value filtering and also for measure grouping.

Please help us by suggesting a workaround or solution for these behaviors.