The components that the sensors monitor include memory (RAM), processor (CPU), platform control hub (PCH), and voltage regulator (VR). VR temperature, means Voltage Regulator temperature. For more complete explanation, please read here: https://sites.google.com/site/visualbios/advanced/cooling/temperatures
Now I understand better your question. On the left panel, near the temperature graph, you can see label marked VR temperature (which means Voltage Regulator temperature), however on the R.H side panel, there is not possibility to chose VR temperature sensor. VR temperature sensor measures temperature on Voltage Regulator, while Processor Temperature Sensor measures temperature on CPU core (which is other place). Probably there is an error in the bios label, which should be CPU temperature, rather than VR temperature.
Wait for confirmation from Intel's agent. He will probably answer on Monday.
Don't be shocked. This reading is not important as you think. As I've wrote you VR means in this case Voltage Regulator. I still think that this is an error in bios label and the temperature shown is for CPU (I can't be sure, since I don't have NUC8i5BEH). Any way any temperature reading shown in bios is not indicative for the temperatures under the O.S. regime with real load. So better download free application, for example HWMonitor https://www.cpuid.com/softwares/hwmonitor.html and you will be able monitor you NUC during operation.
There is no cpu temp in bios. I always knew what VR Temp was but I was so surprised that cpu temp was absent, I though maybe Intel found a new name for it. They have silly things like memory temp but no cpu temp. Shocking, unbelievable.
Well I was so shocked that maybe Intel call the cpu temp vr temp or they labelled it wrong. Can't put anything past Intel with them leaving the cpu temp out. BTW, it's one noisy unit.