When the twins’ biological mother Jo briefly came back from the dead, she bonded with Josie, since Josie takes after Jo the way Lizzie takes after Caroline.
The first reference Legacies Season 1 had to Caroline was when Josie (Kaylee Bryant) tried to explain that Lizzie was acting out because she missed their mother Caroline.
It’s interesting to think of the advice Candice King may have given Jenny Boyd on playing Caroline’s daughter.
Maybe she just suggested Boyd enjoy the experience?