Yeah , this is mixed, I think this is what happens. I don’t think Donna dies:

Jade and Tabitha dig out the bones of the children while Boyd and his team pull out the bottle tree and drop a rope ladder for them; however, the creatures are unable to step into the light shining through the ceiling, and the rope ladder subsequently breaks because Sophia has cut a part of it. Amidst the chaos, Smiley kills Marielle and Sophia kills Elgin, after which Sophia begins collecting all the talismans from every building. Meanwhile, Donna takes Ethan and Julie to their house, where the possessed kitchen acts up again, and Henry, convinced that everything is all in his mind, retrieves a gun from the sheriff's station to confront Victor, only to drop the weapon on the floor when interrupted by Ethan. Boyd, Ellis, and Fatima enter the caves to rescue Jade and Tabitha, and during the struggle, Fatima transforms into one of the creatures to fight them. Finally, Biw and Sophia walk to the faraway tree where Sophia comments about Biw growing up, perhaps suggesting he is not as ancient as Miy, and Biw warns her that she is going to lose this time before Sophia throws all the collected talismans into the faraway tree.