One really odd scene that came up was when Officer Howie went to go look around the old destroyed church and found a woman breastfeeding a child and holding an egg in her hand.
My first thought is that this has to do with something about fertility although I’m not sure what. I looked up meanings behind eggs and found that they may represent growth and new beginnings. This interpretation would make sense. The island people wanted to sacrifice Howie in order to appease the sun god to bless their crops so that they will grow again. I take what the woman is doing is in a way a message to Howie that he will be involved in some kind of growth.
Egg information received from: https://crystal-cure.com/easter-eggs.html