The first two Fantastic Beasts films take place in the mid-to-late 1920s, and have shown us the rise of Albus Dumbledore’s first true nemesis, Gellert Grindelwald. According to the Harry Potter canon, Rubeus Hagrid was born in 1928, a whole year after the series begins. For his character to feasibly be integrated into a Fantastic Beasts story, at least in a way that’s meaningful, they’d have to jump ahead quite a few years (or, someone would have to get ahold of Dumbledore’s time-turner).
Article source: https://www.cinemablend.com/news/2485512/the-harry-potter-character-eddie-redmayne-really-wants-in-fantastic-beasts-3