React Native Modal Positioning

I'm using the Modal built into React Native (and specifically I'm using the React Native Paper variant). By default this seems to open in the middle of the screen. However if you're doing some text input in the Modal then it would be more useful if it opened either at the top of the screen, or was aware of the keyboard. However I can't find a way to get this to work.

My (simplified) modal code is:

     <Portal>
      <Modal visible={visibleModalNew} onDismiss={closeModalNew} contentContainerStyle={styles.modalContainer} >
        <View>
          <Title>New</Title>
          <View>
            <TextInput
              mode="outlined"
              label="Data"
              style={{alignSelf:'center', width:'95%'}}
              defaultValue={newData}
              onChangeText={newData=> setNewData(newData)}
              onSubmitEditing={() => handleDone()}
            />
            <Button onPress={() => doSomething()}>Do something</Button>
          </View>
        </View>
      </Modal>
    </Portal>