Thanks for your posting and considering Aspose.Cells for Cloud.
Tables or List Objects are supported in Aspose.Cells for .NET but it seems you need these features in Aspose.Cells for Cloud.
I have checked the following page and found that this feature is not supported but we will confirm it and update you asap. In case, this feature is not supported, we will add a New Feature request for it in our database to support it in our future cells cloud releases.
In the above link, please expand the node so that you could see all the supported features by Aspose.Cells for Cloud.
Please also provide us your source excel file and the expected output excel file which you can create manually using Microsoft Excel. It will help us look into your issue more closely and precisely.