The Lexar SSD is an NVMe. According to the description on the hub:
"Internal SSD enclosure fits M.2 SATA SSD drives only, does not work with NVMe. "

Hello

I have additional information on the Satechi homepage:https://support.satechi.com/hc...
I hope the information helps

Kind regards R. Pauli

Good day
I have installed the SSD Intenso Top Performance 1000 GB, M.2 2280 SSD protocol in the Satechi USB-C Stand&Hub
AHCI (SATA), it works perfectly. (Item no. 12262495)
I have formatted the SSD in ExFAT format.
Please note: The internal SSD enclosure only fits M.2 SATA SSD drives and does not work with SSD protocol NVMe.

It is as said below. It needs an M.2 SATA SSD

That's the problem with this HUB, M2Sata is supported, NVMe is not. In my case, an M2Sata 2TB Blue from WD is working there. Unfortunately, there is not much choice of M2 Sata and because it is a Sata, the port only has the ridiculous speed of it. I can't tell you why Satechi makes the hub so bad as a result
Second thing, it is mounted upside down, so when installing you should see the back of the SSD.
But the connector is documented as it should look.

In your case, replace the HUB or get an external NVMe enclosure. The parts are also really fast in there, not like in the Satechi.

For my part I put a werbatim it works very well and I formatted in Fat32 no worries.
You have to think of it as an external HDD, not as the Mac's own memory.

I have installed a Samsung 970 EVO Plus M.2 with 1 TB. Works perfectly. As far as I know, a maximum of 1 TB is supported.