This sounds very American. You don't need a data privacy specialist to operate in the EU. You need to develop with privacy first by design. Treat all PII as radioactive. Literally. Yes, if you need to bolt this onto existing US software to make it "compliant", you're screwed and you'll need to call in a containment team like when you find radioactive cargo in your business that is not normally expected to handle it.
A lot of times topics like GDPR and privacy are brought up on HN I'm seeing comments that act like it's black magic. It really isn't. It's trivial to be "good enough" as far as legislation is concerned. The problem is just that over the past decades and especially in the US we've seen myriads of online services sprout up that now often seem integral but were built with a complete disregard for privacy and now need to either be retrofitted or somehow contained to become compliant. It's like finding out paint is radioactive after it has been marketed for decades with no regulation or oversight.
Internet companies have been playing it fast and loose with privacy well past the point that people started pointing out it's a (ethical if not legal yet) problem. That is now coming back to bite them. I'm okay with that. It's just a shame so many businesses are caught in the crossfire because those companies have also tried their best to make themselves integral and unavoidable. Good luck trying to migrate away from AWS/Azure/GCP for example.