Webpack: UI Library's exports in index.ts are getting eliminated as unused exports?

Question

I have my own ui library setup with webpack(v5.75.0) as the bundler. When it's built, all the exported components from src/index.ts (specified as entry file in webpack.config.js) are getting eliminated.

As a webpack newbie, it feels like tree shaking is happening although I actually want to export all of the components even if not used internally in the UI library package.

Here're the src/index.ts and webpack.config.js. I'd appreciate any pointers. Thanks in advance.

src/index.ts

export * from './componentA';
export * from './componentB';

webpack.config.js

module.exports = {
  entry: ['./src/index.ts'],
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'index.js',
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        use: 'babel-loader',
        exclude: /node_modules/,
      },
      {
        test: /\.ts(x)?$/,
        loader: 'ts-loader',
        exclude: /node_modules/,
      },
      {
        test: /\.css$/,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader',
            options: {
              importLoaders: 1,
            },
          },
          'postcss-loader',
        ],
      },
      {
        test: /\.svg$/i,
        issuer: /\.tsx?$/,
        use: ['@svgr/webpack', 'file-loader'],
      },
      {
        test: /\.png$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              mimetype: 'image/png',
            },
          },
        ],
      },
    ],
  },
  devServer: {
    static: {
      directory: './dist',
    },
  },
  plugins: [
    new CopyPlugin({
      patterns: [{ from: 'src/assets' }],
    }),
    new BundleAnalyzerPlugin({
      analyzerMode: 'static',
      openAnalyzer: false,
    }),
    new MiniCssExtractPlugin(),
    new CleanWebpackPlugin(),
  ],
  resolve: {
    extensions: ['.tsx', '.ts', '.js'],
  },
  externals: {
    react: {
      root: 'React',
      commonjs2: 'react',
      commonjs: 'react',
      amd: 'react',
    },
    'react-dom': {
      root: 'ReactDOM',
      commonjs2: 'react-dom',
      commonjs: 'react-dom',
      amd: 'react-dom',
    },
  },
};