I'm making it my top priority to find the information you're looking for. Can you clarify for me where in your QuickBooks Online (QBO) company the data is missing from? If the company file appears to be completelyempty, it's likely that you've created a new company by accident. You can verify this by clicking the Gear icon (⚙) and selecting Switch Company. Search this menu for any QBO companies that you're unfamiliar with.
Any additional information or screenshots you can provide me with will help to ensure a timely solution. Thanks for coming to the Community, I'll keep an eye out for your response.