Will all drives in a Daisy chain be part of the RAID?

Hey. So I’m new to using RAID devices and I need some help. I want to buy a G-Tech G-RAID drive that i can use with my iMac. This means I’m gonna need the Thunderbolt 3 variant. I have been looking at reviews and they mention the device can be daisy chained using Thunderbolt but they don’t mention how this would appear on the computer. I want to use RAID5. So from what I’ve read, I need 3 Drives. The product I’m looking at only comes with two drives. Can I use two of these RAID devices in daisy chain and have all four drives in one RAID? Or will they both appear as two separate RAID drives?