In distributing Holy Communion it is to be remembered that “sacred ministers may not deny the sacraments to those who seek them in a reasonable manner, are rightly disposed, and are not prohibited by law from receiving them”. [177] Hence any baptized Catholic who is not prevented by law must be admitted to Holy Communion. Therefore, it is not licit to deny Holy Communion to any of Christ’s faithful solely on the grounds, for example, that the person wishes to receive the Eucharist kneeling or standing. -- Paragraph 91
Receiving on the tongue while kneeling remains the universal norm for Holy Mother Church. Local indults can produce different local norms, but those are exceptions that must be approved by Rome alone. Unfortunately almost the entire globe is covered by such local indults.
Good to know there is grace within Catholic church theology.
I would have given the girl communion, unless there were theological grounds for denying it. I’m on the side of grace of these issues, because people are imperfect.