Happy to report that after 536 days (applied on September 30, 2021), both my children (aged 2.5yo and 3.5yo) were conditionally approved on March 20, 2023.

I went to schedule the interview and I noticed that the Montréal Trudeau Airport NEXUS Enrollment Center was available so I booked two appointments mid-June.

The interview confirmation letter sats exactly what the press release of CBSA/CBP mentioned by Kaasschaaf says: the NEXUS Enrollment Center is staffed only with Canadian CBSA officers. The interview by U.S. CBP will be performed at the U.S. Preclearance as we fly back. It says to give ourselves enough time for the interview before boarding our flight.

It will be nice to get some feedback about the 2-step interview, and learn more about how the U.S. CBP portion in the Preclearance zone is performed (how long it takes etc...).

We are still not back to normal where U.S. CBP officers would be inside the airport NEXUS Enrollment Center next to the CBSA.