Problem when linking DECT modem libraries for the nRF9161

I'm trying to create a board configuration for MicroPython under the Zephyr port for the nRF9161 and add functionality to use the DECT modem. I'm following the example code from the DECT demo found here: https://github.com/nrfconnect/sdk-nrf/tree/main/samples/dect/dect_phy/hello_dect

I'm linking agains this library: https://github.com/nrfconnect/sdk-nrfxlib/tree/main/nrf_modem/lib/dect_phy/nrf9120/hard-float

But the linker also fails to find the following functions:

nrf_modem_os_sem_give()

nrf_modem_os_event_notify()

nrf_modem_os_is_in_isr()

Among others... Anyone knows where can I find those functions? 

Cheers,

Daniel

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