This article tells about the possible way to migrate virtual LWC to physical LWC appliance.

If the vLWC and Physical LWC are associated with the same account id.

You need to configure the Physical LWC Appliance by following the Juniper doc mentioned below and move the device groups to the physical LWC from the Juniper Support Portal.

Whatever device groups you have created with the vLWC, we can move them all to the physical LWC from the Juniper support portal.

Note: When you migrate, that day, the data collection will be impacted.

Please refer to the physical LWC configuration: 

https://www.juniper.net/documentation/us/en/hardware/lwc-hardware-guide/lwc/topics/task/lwc-devices-installing-and-connecting.html

https://www.juniper.net/documentation/us/en/hardware/lwc-hardware-guide/lwc/topics/topic-map/lwc-initial-configure-ntwrk-ports.html