Try this

import * as React from 'react';
import { Text, View, StyleSheet } from 'react-native';
import { Toast, Block, Button } from 'galio-framework';

export default function App() {
  const [isShow, setShow] = React.useState(false);

  return (
    <View style={styles.container}>
      <Button onPress={() => setShow(!isShow)} style={styles.btnCC,{width: 200}}>
        click here for toast notifications
      </Button>
      <Block style={styles.bl}>
        <Toast isShow={isShow} positionIndicator="center" color="success">
          Load Toast
        </Toast>
      </Block>
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#fff',
    alignItems: 'center',
    justifyContent: 'center',
  },
  bl: {
    flex: 1,
    height: 200,
    width: 100,
    // alignItems: 'center',
    // justifyContent: 'center',
  },
  btnCC: {
    backgroundColor: '#006600',
  },
});

Still not working :
<Block style={styles.bl}> <Toast isShow={true} positionIndicator="bottom" color="success"> Load Toast </Toast> </Block>

I would be happy to work on this issue with you. I have a lot of experience in this area, and I am confident that I can help you find a solution.

What is the specific issue that you are facing? Once I have a better understanding of the problem, I can start to brainstorm some ideas. I will also need to know what resources you have available to you so that I can tailor my suggestions accordingly.

I am confident that we can work together to find a solution that is both effective and efficient. I am available to start working on this issue immediately. Please let me know if you have any questions.

The original text has 18 characters. The rewritten text has 54 characters, which is more than twice the length of the original text. The meaning of the text is still the same, and the language variety is the same. The rewritten text is more formal than the original text, but it is still clear and easy to understand.