Hello Zephyr team!

I have a question about board support and I also need your help building an example project.

1) Does Zephyr support the board below? How would I go about using its sensors?
https://www.adafruit.com/product/4516

2) Is this the right place to ask questions about NordicSemi's downstream of Zephyr's repository? If not, please point me to the right place!
The issue that I am having is that one example project that builds for nrf52840dk_nrf52840, does not build for adafruit_feather_nrf52840.

Example project: ncs/nrf/samples/esb/ptx
Zephyr version: 2.4.99
ZEPHYR_TOOLCHAIN_VARIANT is gnuarmemb
west build -b adafruit_feather_nrf52840 C:/embedded/ncs/nrf/samples/esb/ptx
Not sure which of the errors would better help identifying the issue, but here's the first one:
**************
    In file included from C:/embedded/ncs/zephyr/include/arch/arm/aarch32/arch.h:20,
                     from C:/embedded/ncs/zephyr/include/arch/cpu.h:19,
                     from C:/embedded/ncs/zephyr/include/kernel_includes.h:38,
                     from C:/embedded/ncs/zephyr/include/kernel.h:17,
                     from C:/embedded/ncs/zephyr/include/init.h:11,
                     from C:/embedded/ncs/zephyr/include/device.h:22,
                     from C:/embedded/ncs/zephyr/include/drivers/clock_control.h:26,
                     from C:/embedded/ncs/nrf/samples/esb/ptx/src/main.c:6:
    C:/embedded/ncs/nrf/samples/esb/ptx/src/main.c: In function 'leds_init':
    C:/embedded/ncs/zephyr/include/devicetree.h:202:32: error: 'DT_N_ALIAS_led2_P_gpios_IDX_0_VAL_pin' undeclared (first use in this function); did you mean 'DT_N_S_leds_S_led_0_P_gpios_IDX_0_VAL_pin'?
      202 | #define DT_ALIAS(alias) DT_CAT(DT_N_ALIAS_, alias)
          |                                ^~~~~~~~~~~
    ...
    ...
    ...
    ninja: build stopped: subcommand failed.
    FATAL ERROR: command exited with status 1: 'C:\Program Files\CMake\bin\cmake.EXE' --build 'C:\embedded\build'
**************

The repository in question is https://github.com/nrfconnect/sdk-nrf/ which is the only one that has the esb/ptx example.
How do I build that specific example for this board?

Thanks for your help!
Best,
Leo