Flat List scroll direction - https://mobiledevtutorials.com/how-to-find-out-flatlist-scroll-direction/

app.js

const App = () => {
  const lastContentOffset = useSharedValue(0);
  const isScrolling = useSharedValue(false);
  const renderItem = ({ item }) => <Item title={item.title} />;
  const scrollHandler = useAnimatedScrollHandler({
    onScroll: (event) => {
      if (lastContentOffset.value > event.contentOffset.y) {
        if (isScrolling.value) {
          console.log("UP");
        }
      } else if (lastContentOffset.value < event.contentOffset.y) {
        if (isScrolling.value) {
          console.log("DOWN");
        }
      }
      lastContentOffset.value = event.contentOffset.y;
    },
    onBeginDrag: (e) => {
      isScrolling.value = true;
    },
    onEndDrag: (e) => {
      isScrolling.value = false;
    },
  });
  return (
    <SafeAreaView style={styles.container}>
      <AnimatFlatList
        data={DATA}
        onScroll={scrollHandler}
        renderItem={renderItem}
        keyExtractor={(item) => item.id}
      />
    </SafeAreaView>
  );
};