How to see serial number of BIG-IP devices on BIG-IQ

You can actually use the inventory export on the BIG-IP devices page in the BIG-IQ system interface which produces a CSV file. The managed BIG-IP device's serial number as well as registration key can be found in that CSV file. This includes VIPRION chassis serial number as well as the installed blade's serial number. Additionally, the BIG-IQ system interface reports the serial numbers of VIPRION installed blades on the property page of the managed VIPRION device. For more information, you can check out https://support.f5.com/csp/article/K32548743