Albus Dumbledore Jude Law means to stop him, but their blood pact prevents him moving against his former lover.
Albus Dumbledore assigns Newt and his allies with a mission related to the rising power of Grindelwald.
On top of that, Rowling herself continues to be a for many fans for her outspoken transphobic views.
Grindelwald escapes, Vicência Santos Maria Fernanda Cândido is elected Supreme Mugwump and Credence is reunited with his father Aberforth Richard Coyle who takes him home, presumably to die as Credence is slowly dying from the Obscurus inside of him.
Fantastic Beasts 3 is filled with twists, many of which are thanks to Dumbledore's complicated plan to stop Grindelwald's reign of terror.
Even if we analyse this against the Fantastic Beasts 2 scene in which Dumbledore states that they were closer than brothers, it's an ambiguous line at best.