Most cellular product creators (Electron, E Series, and Boron) don’t claim the devices to customer accounts. Instead, they claim all of the devices to their own account and build the price of cellular connectivity into the cost of the device or their own monthly fee.
You can use customer claiming with cellular devices, however there is no device setup library for cellular devices. Without the need to configure customer Wi-Fi using a mobile app when using cellular devices, the need for customer claiming generally isn’t as great.