Questions about Unitek Y-3027 Storage Drive Docking Station USB 3.2 Gen 1 (3.1 Gen 1) Type-C

No, this is not possible, these two slots do not have any knowledge of a RAID configuration. They simply are, if you plug in a drive, individudal drives that show up on the desktop.

According to the manufacturer, "Dual SATA 16 TB", i.e. 32 TB in total and 16 TB per hard disk.