GoogleAnalytics ID set but no googletagmanager script

[maxgio92]

Hello,
I'm trying to link my blog to Google Analytics.

What I've done, is simply set the Hugo parameter googleAnalytics to my Google-released ID.

Unfortunately, it seems from Analytics is still not linked. Google expects this:

<!-- Google tag (gtag.js) -->
<script async src="https://www.googletagmanager.com/gtag/js?id=G-12345678"></script> # THIS IS MISSING ONLINE
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

  gtag('config', 'G-12345678');
</script>

Indeed the online site blog.maxgio.me doesn't contain it.
This is the related repo: github.com/maxgio92/maxgio92.github.io.
And the full raw config here.

The thing is that the local build served with:

hugo --minify
hugo serve

seems to contain the expected scripts (especially the googletagmanager.com script, missing from the online build).

For the online site, I build and deploy to the Github Page (https://blog.maxgio.me), made via Github Action, where basically it's simply run:

...
- name: Build
  run: hugo --minify

- name: Deploy
  uses: peaceiris/actions-gh-pages@v3
  with:
    publish_dir: ./public
  ...

The full publish workflow here.

I'm probably missing something. Does this looks correct to you? Do you have any hints?

Thank you