It’s highly unlikely that the girl who was kidnapped in Portugal is Madeleine McCann, a British girl.
According to the analysis, Julia Faustyna is most likely not Madeleine McCann.

The girl who was kidnapped in Portugal in 2007 is probably not the Polish woman who gained internet fame after claiming to be missing British girl Madeleine McCann, according to a facial recognition study.

In a facial recognition test, Julia Faustyna, who has also been referred to as Julia Wendell or Julia Wandelt, did not successfully match images of McCann.