Fantasy covers a huge range
Fantasy is one of the hardest shelves for parents because the covers can look similar while the content is very different. A dragon adventure written for middle grade readers, a dystopian survival story, and a romantasy series with explicit adult content can all show up in the same recommendation feed.
The safest move is to separate the fantasy label from the content question. Fantasy tells you the world the book lives in. It does not tell you how graphic the violence is, how intense the fear is, or how far the romance goes.