Filming has begun.

https://bloody-disgusting.com/news/3736717/the-nun-2-filming-finally-underway-on-the-sequel-to-hit-conjuring-universe-movie/

1956 – France. A priest is murdered. An evil is spreading. The sequel to the worldwide smash hit THE NUN follows SISTER IRENE as she once again comes face to face with the demonic force VALAK – THE DEMON NUN.