Drivers are loaded but I can't use the command:
lsmod | grep nvme
nvme 32375 0
nvme_core 58654 1 nvme
Error:
bash: nvme: command not found...
You need to install it. On RHEL/Fedora systems:
sudo dnf install nvme-cli
Someone else can tell you how to do it for Ubuntu. (Sorry, I'm a Red Hat guy.)