The Goq-
What a sad post.
Although she’s your niece and not your daughter, it brings to mind the quote “How sharper than a serpent’s tooth it is to have a thankless child”.
Teens and young adults sometimes distance themselves from parents or other older relatives / acquaintances for reasons only they know, and in later years are sorry they did.
I think one of the most common feelings parents of teens have is regret about the way they behaved toward their parents and other relatives when they were teenagers themselves.
IY”H this will only be temporary, and she will be happy to have her uncle dance in the middle at her chasuna.