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You can convert a SmartArt shape into a Group Shape using the Shape.GetResultOfSmartArt() method. It will enable you to handle a SmartArt shape like a Group Shape. Consequently, you will have access to the individual parts or shapes of the Group Shape.
The following sample code loads the sample Excel file containing a SmartArt shape as shown in this screenshot. It then converts the SmartArt shape into a Group Shape and prints the Shape.IsGroup property. Please see the console output of the sample code given below.

Is Smart Art Shape: True
Is Group Shape: False
Is Group Shape: TrueAnalyzing your prompt, please hold on...
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