Nah, Jason, that's complete tosh. Her back story is that she's a tinker. Tough as nails? Sure. Good with a sword? How? Has she even seen one before? How about the amazing starship repair skills she has? Where does a tinker stealing scrap from crashed ships learn how to maintain hi tech equipment? How about her amazing piloting skills? Where did they come from? How about her instant ability to speak Wookie, and her bloody annoying insistence on translating for Luke. How many Wookies did you see on Jakku?
Or take the opposite approach. What is her weakness? Where can her character develop? Is there anyone in the entire story arc who doesn't instantly love her, or who doesn't take her seriously? Even the space alien walrus's took an instant shine to her!
She couldn't be any more OP if Matthew Ward himself had written her. Tbh I think her missing parents might be Kaldor Draigo and one of the 5th edition Sisters Of Battle!
Look, if an orphan from the Sudan stepped into the Western World tomorrow, after spending her entire life salvaging scrap in Darfur, it would be reasonable to expect her to be smart and resilient. She might even be able to get a motorbike or jeep working. But it would be completely unreasonable to believe she could fix and fly helicopters, operate hi tech weapons, converse in languages she's never even heard before and be loved and adored by everyone she meets.
I know it's fiction, but she's not a strong female character, or a tough heroine. She's a Disney Princess with a lightsabre- sugar and spice, all things nice. No weaknesses, no flaws, no real issues beyond the Disneyeske babe in the woods origin story.