The requirement is to call Scala sbt plugin action (Refresh Action) and intelliJ synchronize all action from a custom plugin. As described here, we can use below syntax to call Actions of other plugins from our custom plugin :-
ActionManager.getInstance().getAction(IdeActions.ACTION_COPY_REFERENCE);
Is there any way to figure out Action name and ids for functionalities that are highlighted in red blocks in below screenshot :-

The action is
com.intellij.openapi.externalSystem.action.RefreshAllExternalProjectsActionwith idExternalSystem.RefreshAllProjects(seeExternalSystemActions.xml)To trigger a project refresh programmatically, you don't need to call the action. You can use
com.intellij.openapi.externalSystem.util.ExternalSystemUtil#refreshProjectsIn IntelliJ IDEA 2020.1 you may also use the experimental
com.intellij.openapi.externalSystem.autoimport.ExternalSystemProjectTrackerAPI viaAutoImportProjectTracker.getInstance(???).scheduleProjectRefresh()