Welcome to the Community, Oligschlager73.
Yes, you're right. For now, being able to import .qbw file directly in QuickBooks Online is unavailable. The .qbw is the file extension for a backup file format utilized by QuickBooks Desktop. You may need to use a trial version of the QB Desktop and restore the backup to open it and then export it to Online.
Here's a link with the details on how you can move your Desktop file to Online: Move your QuickBooks Desktop file to QuickBooks Online.
You also have the option to use a third-party app that can help you with integrating this directly into QuickBooks Online. You can visit this link: https://apps.intuit.com/app/apps/home.
I'll be around if you have any other concerns.
