I am working with AT&T IoT Starter Kit (LTE-M, STM32L4). The kit (& other like 2nd Generation kit with M18Q2FG-1 LTE Cat-4 modem module) has Avnet M14A2A Cellular Shield and as per the validated chipset sheet available at below AT&T link, cellular module has pre-built Embedded OMA LwM2M client.
Could this embedded LwM2M client be configured, perhaps using AT commands, to make it connect to AT&T/other LwM2M server?
I digged into the associated Firmware and found the below AT commands, which looks relevant, but didn't work for me. Other than this, I am not finding any relevant documentation, which could be of help.