Steps

In ListView Talk.js wrap foreground's Image in a TouchableOpacity like this:

          renderForeground={() => (
            <View key="parallax-header" style={ styles.parallaxHeader }>
              <TouchableOpacity onPress={() => { AlertIOS.alert('Foreground Clicked!') }}>
                <Image style={ styles.avatar } source={{
                    uri: 'https://pbs.twimg.com/profile_images/2694242404/5b0619220a92d391534b0cd89bf5adc1_400x400.jpeg',
                    width: AVATAR_SIZE,
                    height: AVATAR_SIZE
                }}/>
              </TouchableOpacity>  
...

Build and run the modified code, then click on the foreground image, that is, the head in the bubble.
The result is: "Foreground Clicked"

So far, so good.
Now increase STICKY_HEADER_HEIGHT from 70 to 270:

const STICKY_HEADER_HEIGHT = 270;

(By increasing STICKY_HEADER_HEIGHT from 70 to 270 the sticky header are will overlap with the foreground are that renders the TouchableOpacity area.)

Build and run the modified code, then click on the foreground image, that is, the head in the bubble - as before.

EXPECTED

Alert popping up saying "Foreground Clicked!"

ACTUAL

No alert.