Sure thing, and thanks for your reply.
smartctl -H -A -f brief /dev/nvme-subsys0
smartctl 7.2 2020-12-30 r5155 [x86_64-linux-5.15.39-3-pve] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org
Smartctl open device: /dev/nvme-subsys0 failed: No such device