Google Docs, Sheets, and Slides users on iOS will now be able to edit Microsoft Office files. This will streamline the workflow, as users won’t be required to covert file types all the time. You can edit, comment, and collaborate through this new feature. The feature was already available for Android and Web users.

source https://gadgets.ndtv.com/apps/news/google-docs-sheets-slides-ios-microsoft-office-files-edit-open-add-convert-2329879#rss-gadgets-all