Uh, what? In TFA, Rey accepts her family is never coming back to see or get her, and Finn learns to stop running away from the First Order and fight for someone: Rey.
She doesn’t really accept that, she just swaps out Luke as the one she’s searching for, it’s even spoken in dialogue. That’s not an arc.
The whole reason she wanted to stay on/return to Jakku is to wait for her family to come back, she feels that if she leaves Jakku then her family will not be able to find her there.