Steps

1. Navigate to your Bubble project dashboard and open your app.

2. In the left-hand menu, go to Settings → SEO / metatags.

3. In the Header input field, paste the following code:

<link
  rel="manifest"
  href="https://transcodes_cdn_url/01JWW55QK8Z4MFK9S0RG6527C6/manifest.json"
/>
<script
  type="module"
  src="https://transcodes_cdn_url/01JWW55QK8Z4MFK9S0RG6527C6/webworker.js"
></script>

4. Download the sw.js file from transcodes project panel and upload it to your root directory.

5. Click Save, then refresh your site. Then, you will see PWA is activated successfully