after create docker volume with "sudo docker volume create -d lvm --name ftest --opt size=0.5G", cannot find mount point at /var/lib/docker-lvm-plugin

$ docker volume inspect ftest
[
{
"CreatedAt": "2024-08-14T08:51:31Z",
"Driver": "lvm",
"Labels": null,
"Mountpoint": "/var/lib/docker-lvm-plugin/ftest",
"Name": "ftest",
"Options": {
"size": "0.5G"
},
"Scope": "local"
}
]

Start by reproducing the `docker volume create` command and inspecting `ftest` as shown in the issue. Investigate why the reported `/var/lib/docker-lvm-plugin/ftest` mount point cannot be found, then verify that the volume is mounted at the reported path or that the failure is clearly explained and corrected.

Written by the indexing model from the issue text.