Marketplace products only support Object View tabs that use the Workshop tab builder. The legacy Object View builder is not supported. If you would like to package an Object View tab that leverages the legacy builder, you should first rebuild the tab with the Workshop tab builder.
Adding Object Views to products
To add an Object View to a product, first create a product and then select the Object view content type as below.
Once you have selected an Object View, you can select which tabs you would like to include in your product.