mbed_start_application on Cortex M0

I’m trying to set up a bootloader following this tutorial: Creating and using a bootloader - Program setup | Mbed OS 6 Documentation.

However, with my NUCLEO-F072RB board, the mbed_application_start() function is not defined.

I found this discussion on Github (mbed_application_start() not working on NUCLEO_F070RB · Issue #14916 · ARMmbed/mbed-os · GitHub) which states that the mbed_application_start() function is not available for ARM Cortex M0.

Why isn’t this function available? Is it not yet implemented, or is it not possible to do this with a Cortex M0?