Sabrent USB Type-C Dual HDMI Adapter [Supports Up to Two 4K 30Hz Monitors, Compatible with Windows Systems Only] (DA-UCDH)

Does this allow you to extend both monitors, or just duplicate?

Does this allow for two separate monitors to display different Items that I can drag between them “screen 1, Screen 2”?

Will this extend the desktop to all 3 screens on the surface pro 7? the ones i have tried so far have only duplicated the 2 external monitors.

Is this an active usb-c adapter?