In some places, for older children (say, 7-17), they want them to go through RCIC classes. Then everyone who’s been through RCIA/RCIC gets their sacraments in a large group at Easter.
The first day of Lent is March 6th, and Easter is April 21st. So there’s probably not enough time to get her catechized to join in with this year’s round of candidates. Therefore, it’s likely she’ll have to do her formation classes and undergo her sacraments in 2020.
When you have infant baptism, the parents make the decisions on the child’s behalf, and the child isn’t expected to contribute or agree. However, once you’ve hit the age of reason, I suspect they want people to understand what’s going on. In Orthodoxy, for example, you have three sacraments going on at the same time-- Baptism, Chrismation, and Communion. But for Catholics, they have more separation, and one leads to another— Baptism first, then Confession, then Communion, then Confirmation. But when you go through RCIC/RCIA, several of these all happen for the first time at the same Mass-- because the candidates are usually more mature than if they were cradle Catholics.