Who’s babies go to sleep on their own and when did they start?

My daughter slept on her own at 2 months!..never liked to be rocked ..I just lay her in her crib she grabs her blankly and bam ! She's sound asleep...

BUT she had to be rocked. she learned to self soothe to sleep closer to 8-9 months

mine does. she started sleeping through the night in her own room around 5-6 months

My son does and started at one