Any UK examples? I haven't heard of it though it's not really my field. If you are worried you can always set up a ltd company which is quite cheap and quick in the UK (like £40, same day - company bank account longer).
I am an architect for a company that does ABM, B2B ads, so I am well versed in the subject. We had to move all of our PI data in the raw form to a different AWS account, and only certain individuals with "legal" clearance can access it. This forced us to re-architect almost our entire stack, and rethink our main API.
The whole thing was a massive endeavor that took a whole engineering team two quarters. If this was three years ago, when we were less than a dozen engineers, we would have most likely thrown the towel and forego cookies and business in the EU altogether.