Since The Nun 2 has received an R-rating, it’s worth examining what this means for the film’s suitability for younger and more sensitive viewers. The Nun 2 is a direct sequel to 2018’s The Nun, which itself is a prequel/spin-off of The Conjuring 2. In The Nun 2, the returning character Sister Irene (Taissa Farmiga) will once again face off with Valak, this time at a boarding school in France in the year 1956.
https://screenrant.com/why-the-nun-2-rated-r-parents-guide-scary/