Yes!  Our USBC-NVME enclosure does support SMART data in Windows 10+ and Linux.  Apple macOS is not currently supported for USB to NVME SMART data access.

Access to SMART data is software dependent, we have tested our enclosures with smartmontools, a free, cross platform SMART reading and monitoring utility.  The command line utility smartctl is the primary method for accessing the SMART data from the Linux or Windows terminal.

For our original JMicron enclosures the SMART data can be read using the "-d sntjmicron" argument at the command line, for example:

smartctl -a -d sntjmicron /dev/sdb

Our USBC-NVME enclosures with Realtek RTL9210 chipset use a similar "-d sntrealtek" argument, however this will be automatically detected in future version of smartmontools ( Build #949 (7.2-r5053) as of April 2020 no longer requires the additional argument ). Thank you to the smartmontools team for helping to achieve this!

smartctl -a -d sntrealtek /dev/sdb