Our Dell integration will be able to lookup any device that is available on this page: https://www.dell.com/
This can include laptops, workstations, servers, switches, monitors, docking stations, etc. Dell documentation does not put any guideposts around this so I guess its possible there are some device types that you can't get from the api....but in general we should be pulling info for network devices assuming it has an asset tag and is avail on the above-mentioned page.
Note: Sonicwall split from Dell... and sonicwall devices will not have have the warranty info returned from the Dell api