My 19 months old the same, I think it because before they were eating and was growing loads now the growing has slowed down they not needing to eat as much I read somewhere that most toddler go throw this stage and most likely normal. Not much you can do but to offer it to her and if not eating well that day just give her more snacks, mine eat loads on day and hardly nothing the next xx
My little one is exactly the same!
My 19 month old is exactly the same!