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If I understand correctly, what you want is to share the anchor between the Android device and the HoloLens device. This is supported. Azure Spatial Anchor supports sharing spatial anchors across sessions and devices. You can refer to Tutorial: Share anchors across sessions and devices - Azure Spatial Anchors | Microsoft Learn.
In addition, you can also refer to the answers to frequently asked questions about Azure Spatial Anchor in Frequently asked questions - Azure Spatial Anchors | Microsoft Learn.
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