This is a sympathetic and clearly well-meant movie about an important topic, that just now (2025 - the new Trumpism!) is extremely actual. Unfortunately the script is a bit unbalanced. We do get a convincing picture of how hard it is for the new Helen to cope with the bewilderment and reluctance of her father, the disbelief of her old friends, and the mockery by the bullies at school; and also of all the formal and legal issues that has to be dealt with, when a teenager wants a sex operation. But we hardly get an insight in Finn's mental struggles in the period before his change, while this change itself takes place outside the script: he leaves home for a year in America as Finn, and 5 seconds later we see her come back as Helen.
It was almost mind boggling, and thus hardly realistic, that Helen didn't prepare her father for the change and totally out of the blue (at least for dad) springs this on him when dad comes to collect his son at the airport. And although I applaud Jannik Schümann's courage to take on this unusual and demanding part, I wasn't that thrilled with the way he acted Helen, making her (unintentionally, no doubt) more into a caricature of how a guy plays a woman, with all kinds of supposedly girlish gestures and mimics. The clothes didn't really help, making Helen all the time wear silly flowery dresses as if she was a girl of ten in stead of a 16 yo teenager!
The story itself however became gradually more involving, and it was very touching to see how the father little by little came to accept the new situation and in the end even fought for his son/daughter's right to choose her own new life and happiness.