[firebase_database] sort in a structure version: ^9.0.0

[TheHypnoo]

Hello, I am migrating an entire app to version 9.0.4 of firebase_database, coming from 8.2.0.

The little structure that I don't know how to do is the following:

/
 Users/ 
      uidUser/
         personal-information/
                 name: "Josh"
                 surname: "Smith"
                     phone/
                        t0: "+34 123456789"
                        t1: "+34 123456781"

I use response.snapshot.children:

But the inside of the "phone" is not ordered, only the outside is ordered. Previously in versions lower than ^8 the order was always done and it was correct