It's free on youtube so that's how i watched it:
https://youtu.be/4ZF60rn1hBY?si=g2ooZIh_eiT2eRkw
It's based on a true story written by the Red Cross doctor Madeleine Pauliac, who goes by Mathilde in the film. It's got a twist at the end that has really made me think, although i sort of saw it coming. I was surprised it was rated PG-13. It doesn't show much, but there are some scary moments.