I appreciate you for joining this thread, @Anonymous. Allow me to answer your question.

Yes, Spreadsheet Sync for Google Sheets is available. However, it's only available for QuickBooks Online (QBO) Advanced. You can read more details by clicking this article: Firm of the future.

You can also contact the Spreadsheet sync and Google Sheets support to learn more about the specifications of their product for a successful integration.

Concerning about the statement Spreadsheet Sync is compatible with the Office 365 version of Excel and Google Sheets, it's based on the system requirements when installing them in QBO Advanced, you can read this article for detailed info: Frequently Asked Questions about Spreadsheet Sync in QuickBooks Online Advanced or Accountant.

If you have additional questions about Spreadsheet sync and Google sheets in QBO, don't hesitate to reply to this post. Keep safe, and have good one.