I installed 7 EAP723(AU) 2.0 APs under a OC200 controller which is cloud access enabled.  I am using the omada phone app to access it.

However, in the device info, only 4 of them have 'Serial Number' shown along with 'Model', 'MAC Address',  'IP Address', 'Controller Connection IP', 'Firmware Version' and 'Uptime'.  The other 3 have the 'Serial Number' line missing.

An earlier thread said that the controller fetched the serial numbers not from the AP but via from the Cloud via MAC address (against a TP-Link database I suppose) after the device goes online on the controller.  My OC200, however, is cloud access enabled.  I tried to get the OC200 to forget those APs and re-adopt them via the Omada app but issue remains.  Anything I can do to get the serial numbers shown?  Or somehow they are missing in the TP-Link database?  By the way, the 7 EAP732 were bought in one lot and their MAC addresses are all close to each other.