What is going on

As you may have heard already, because of brexit, Google is moving UK citizens data from the Northern Ireland data controller to the US one (Google LLC). Leaving the EU, UK citizens are not protected anymore by GDPR, and while this may be unfair, Google is legally allowed to do it.

The problem

Even if I'm an Italian citizen and I live in Italy, a few days ago I received this email from them:

What's wrong with it?

The point is that I'm an Italian citizen, living in Italy. I have nothing to do with UK (even if I lived there for a few years in the past, my account was created from Italy).

Why do they mention "UK leaving EU" to me, if I don't live in UK?

I tried to contact them multiple times on their @Google account on Twitter, but I got no reply at all. I tried to search online and it looks like I'm not alone, they are doing this to many other people: https://support.google.com/accounts/thread/29317992?hl=en&authuser=1

Looking for help

What should I do? Is this legally allowed?

If there was an easy way to complain with them, I would have done it already, but I've tried to search on their website (even googling it... no pun intended) but I couldn't find a single contact form to report this issue and of course they are ignoring both Twitter and that forum I linked previously.

Should I report them to the Privacy Authority? If yes, how?

Full text of the email

Here is the full text of the email I received: