If you’re simply trying to review the content, opening it in Docs is fine.
The document should open in whichever app you choose. You may need to install one of them if nothing comes up to select or reset the default app launcher if you don’t get any options like the image below.
If prompted, open the file in ‘Docs’ (Google Docs) or a different doc/docx file viewer/editor if you have it. Tap the file you located in step 1 above to open it.Use Google Drive, your email, or another service to find the Word document.
