Thinking that you are operating in the UK because a UK user can theoretically send packets to you, is similar to thinking a corner store in Japan is operating in the UK because a brit can theoretically get on a plane and fly there to shop.

I run a site in the US and have zero intention of implementing GDPR or geoblocking anyone. If the feckless EU bureaucrats don’t want me serving Europeans, they can either block me or convince their citizens to stop requesting things from my servers. Beyond that, they can fuck off.