Bluetooth PAN on BBBW

I want to tether a BBBW to a cell phone using Bluetooth PAN. Using bluetoothctl, I see the supported UUIDs do not include the PAN profile. The BBBW sees the cell phone and confirms that it provides PANU. The bnep module is loaded. Connecting fails with a helpful message:

Failed to connect: org.bluez.Error.Failed

I’m running the 4.19.94 kernel.

Is PAN supported on the BBBW? How can I get the bluetooth driver to recognize a PAN profile?