It’s a bit of a process, but you could use the chart on the Wikipedia page I linked above and use the Min/Max EV(once you enable extended range in the project settings) and use EV values based on your desired manual settings at ISO 100. With the correct settings, there’s a very tiny difference between Manual mode and a corresponding EV. I haven’t tried the default min/max settings, but yeah I’m assuming since it’s not with the extended luminance range, the values don’t necessarily line up with the huge range required.