Thankfully the UK is leaving so we won't have to comply with this; though our government hardly has the best record on data privacy.
Thankfully they (UK Government) has proven over and over again that they are pretty inept when it comes to doing much with technology. I've worked on a number of Government projects including the recent Test and Trace debacle and they are always a shit-show.
I get that it enabled mobility for EU citizens and the potential for combating large scale problems like climate change, but with human nature being what it is corruption and overreach is unavoidable
especially since founding The 5-Eyes program in 1941