@Go believe , To deploy word. PowerPoint, Excel to Android device, for Android Enterprise enrolled device, you can deploy it via Managed Google Play apps. Here is a link with details for your reference:
For Android device administrator enrolled device, we can consider to deploy via Android store apps
Meanwhile, if you want the apk resource, based on my research, here are some links I found for your reference:
Note: Non-Microsoft link, just for the reference.
Hope it can help.
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