You can import Fusion (.fusiondesign) files and create an AnyCAD reference to the file.
What's New:
AnyCAD for Fusion lets you import Fusion (.fusiondesign) designs as an AnyCAD reference model directly from within Inventor.

To share data between Inventor, a desktop application, and Fusion, a cloud based platform, there are a few things required:
Install Desktop Connector Desktop Connector provides access to the Fusion (.fusiondesign) designs in your Fusion hub from the Fusion desktop drive on your computer.
Download and install Desktop Connector.
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Fusion Project A Fusion hub provides a central cloud location for organizing and controlling access to your Fusion designs. Fusion designs are organized by projects. To access Fusion designs, an administrator needs to invite you to a hub and grant you access to the appropriate project data. If a hub has not already been created for you to join, you can create a hub. Before creating a hub, verify with your collaborators that a hub does not already exist.
Learn more about Fusion Projects and hubs.
Fusion designs can only be opened from a Fusion hub to which you have been granted access.
Use the Open or Import command to select a Fusion (.fusiondesign) design to import.
Refer to To Import Files from Other CAD systems as a Reference or Convert Model for details on how to import a Fusion (.fusiondesign) design.
In the Open or Import dialog box, navigate to the Fusion drive, and then to the Fusion hub where the Fusion model is located and select a Fusion (.fusiondesign) design to import.

Select the import options you want to include and click OK.
There are a few different ways you can sync the Fusion model you have referenced in Inventor with the latest updates.
When you open an Inventor document which has a .fusiondesign reference, Inventor detects if an update is available:
Part file: The lightning bolt icon is enabled Click to update with the latest Fusion data.
Assembly file: A message displays asking you whether to update the file. Select Yes to update. If you select No, the Lightning Bolt icon is enabled.
Part and Assembly file:
Once imported, you can manually check for updates at anytime.
Right-click the Fusion file in the browser, and select Check for Updates.

For more information, see About Inventor to Fusion Interoperability.