Hi there,
Yes, that is one of about 4 that are needed to get the numbers.
I can get 2-3uA. sleep on my device. The info is there on how it is achieved with code, you’ll have to read those and use what “Your” app requires. The Published Numbers are verified in there with code and results.
We are Glad to “TEACH” a man to fish here. 
It’s a well worn Path you are on, so no surprises are ahead.
HTH
GL 
PJ 
Try here Sleep Current of XIAO nRF52840, Deep Sleep vs. Light Sleep - #7 by Devarshi_Bohra
deep sleep
and Light sleep 29’ish uA.
here is another…