I am trying to run blinky from mbed studio on Linux. I have tried both OS and bare metal, OS 5 and 6, but I get a message that my board isn't supported. argument -m/--mcu: NUCLEO_H723ZG is not a supported MCU. Supported MCUs are:

[TDK]

Is there a question?

Board doesn't appear the be supported by mbed. Presumably they will add it in the future.

https://os.mbed.com/platforms/?q=&Board+vendor=STMicroelectronics

Perhaps a better question for the mbed forums:

https://forums.mbed.com/