Some examples for me:
I loved Ian McEwan's depiction of 13-year-old Briony Tallis in Atonement, and David Mitchell's 15-year-old Holly Sykes in The Bone Clocks.
William Faulkner's pregnant Lena Grove in Light in August.
Iris Murdoch's Charles Arrowby in The Sea, The Sea.
Elspeth Huxley's depiction of four generations of Kikuyu tribesmen in Red Strangers.
There's certainly no reason we can't write different subject-positions well! It just takes a genuine interest in other people's humanity.