Using macOS diskutil output to search the device identifier for a given volume name

search_devicename_example.sh

#!/bin/sh

# search mount point based on the device name
search_devicename () {
  diskutil list -plist | \
    plutil -convert json -r -o - - | \
    jq -c '[.AllDisksAndPartitions[].APFSVolumes, .AllDisksAndPartitions[].Partitions] | flatten | map(select(has("VolumeName")))[] | {volume: .VolumeName?, id: .DeviceIdentifier?}' | \
    jq -r --arg volname "$1" 'select(.volume == $volname) | .id?'
}

# mount an external disk with "external_disk_name"
diskutil mount `search_devicename external_disk_name`