class HelloModel extends FlowModel {
  render() {
    return (
      <div>
        <h1>Hello, NocoBase!</h1>
        <p>This is a simple block rendered by HelloModel.</p>
      </div>
    );
  }
}

export class PluginHelloClient extends Plugin {
  async load() {
    this.engine.registerModels({ HelloModel });
  }
}

<FlowModelRenderer model={model} />