For my own Nexus interview the CBP officer asked me the question, I mentioned that I have been travelling extensively to the US for business meetings and these recurrence of this trip post CoViD is already increasing.
This question was not asked to my wife and my daughters during their respective interviews
Our last visit 2 days to the Whirlpool location the CBSA officer explained that there location is not doing IRIS scans anymore and said that next time when they are using the GE/Nexus kiosks at the Canadian airport they will have to do a facial recognition/verification at the airport
https://www.cbp.gov/travel/trusted-traveler-programs/nexus/card