Azure Spatial Tutorial - iOS conversion from Hololens

Question

Following this tutorial: https://learn.microsoft.com/en-us/learn/modules/azure-spatial-anchors-tutorials/9-exercise-azure-spatial-anchors-for-android-ios?tabs=winxr

Got the Azure Spatial demos to work on Hololens 2, but running into these issues for iOS:

   Library\PackageCache\com.microsoft.azure.object-anchors.runtime@d11b205b6ed3\Runtime\Core\MultiAnchorObjectPlacement.cs(221,44): error CS0246: The type or namespace name 'IObjectAnchorsTrackingResult' could not be found (are you missing a using directive or an assembly reference?)  
     
   Library\PackageCache\com.microsoft.azure.object-anchors.runtime@d11b205b6ed3\Runtime\Core\MultiAnchorObjectPlacement.cs(227,39): error CS0246: The type or namespace name 'IObjectAnchorsTrackingResult' could not be found (are you missing a using directive or an assembly reference?)