I wouldn’t be sure all of them are. Our daughter (now almost 2 years old) is also a good sleeper and she tends to sleep from 9-10 PM to 7-8 AM with just a few backrubs and sips of water in between. Not something I hear from other parents for sure, but there are some really great sleeper babies out there.
This is probably too late for OP, but may be useful for others. Baby Buddy was such a nice tool to have when our daughter was really small. It’s a self hosted app, so needs a tech savvy dad/mom.
I struggled a little bit setting up, but boy it was worth it. As it was also connected to Home Assistant, I was able to show some nice stats and reminders on our kitchen dashboard. Plus I had a Hue switch lying which I was then quickly able to reprogram into quickly add feedings, and diaper changes into the database.