WDS120G1G0B is supported. But replaced by WDS120G2G0B.
The WDS120G1G0B is not reconginsed in the NUC. Tested it with anonther device, there it works.
Also see https://forums.intel.com/s/question/0D70P0000068VecSAE (here the G2 is replaced by a G1 and then it works.
I'm using the NUC5i3RYH with the latest BIOS update.
Yes. It works on other computers. The NUC does not recognize it. I Found: https://forums.intel.com/s/question/0D50P0000490S7HSAU/nuc7i3bnh-doesnt-recognize-wd-green-120gb-m2-... which also show a G2 not being recognized. Although the user states it was a broken SSD that got replaced, the working replacement in the screenshots is a G1.
The 1 is on the compatibility list from Intel. The 2 unfortunately not.