However, "engineering" in France is more of a title than a field. It corresponds to all degrees delivered by the écoles d'ingénieurs which, although they were intended to create engineers, have since evolved to meet the requirements of the job market, and have kept their name although their teachings aren't quite as strictly engineering-related as they used to be.

So yeah, you could get a degree from an engineering school that's mostly about statistics. But you could also learn about statistics while doing a math degree at the university. It's just some terminological oddity coming from our weird system.