In ESXi:

Select Adapter whose Type is "NVME over TCP" to open the Controllers list window.

Note down the target information displayed in Name and Subsystem NQN, and delete all of them.

An initiator name (host NQN) is automatically generated from <hostname> and <hostname> is changed automatically.

# esxcli system hostname set --host=<hostname>

# esxcli system hostname set --fqdn=<fqdn>

Select Adapter whose Type is "NVME over TCP" and Controllers to open the ADD CONTROLLER setting window, and then register the target information.

As the target information, re-specify the IP address, port number, and Subsystem NQN that you noted down in step 1.

If volumes are still not visible after reconnection, check for other failures by following If a failure status is detected in the storage cluster.