Here are more data points:
US applicants applied on 2019.07.05.
Conditionally approved on:
2019.08.29 (1st kid)
2019.09.12 (2nd kid)
2019.09.22 (3rd kid)
2020.02.15 (dad)
2020.05.09 (mom)
Multiple calls and emails to both Canadian and US sides didn't help much, but they were all nice, nevertheless.
Registered just to add these data points as this thread has assuaged much anxiety from waiting for so long; much thanks!