Hello,
What i tried:
1 Populate select with service datasource.
2 After select was populated - click on it and change value to any item from suggested list.
3 Get "Value change" event.
May be you mean you don't have "value change" after service populated your select? If so - you can trigger it with following way:
1 Add to your service(which populates your select) success event handler(should be after "mapping" event handler.
2 Populate it with following JS code:
pre
//Where "mobileselectmenu_141" is your goal select component.
Apperyio("mobileselectmenu_141").change();
/pre
Regards.