It's not affecting after deploying the site to Netlify.

[saadfrhan]

/gatsby-config.js

module.exports = {
  plugins: [
    `gatsby-plugin-material-ui`,
    {
      resolve: `gatsby-theme-material-ui`,
      options: {
        webFontsConfig: {
          fonts: {
            google: [
              {
                family: `Poppins`,
                variants: [`700`],
              },
            ],
          },
        },
      },
    },
  ],
};

Unexpected result