Since you’re looking for two drives, you could use two external thunderbolt drives with macOS’s built in RAID.
I’ve been using two Sabrent Rocket Extreme 2TiB SSD drives in RAID0 (stripe) for a couple of years. They are really fast becnhmarks.
I absolutely would not buy a drive with an attached cable. The first Sabrent I bought had an attached cable, which failed, replaced under warranty with the newer model. Happy customer (me) bought a second one, and the RAIDing began.
The ones I bought are no longer for sale, but the 1TiB drives are.
They also have cheaper USB 3.2 drives, but no where near the speed, as far as I can tell.