I believe the main reason is the current "situation" with the US. European agencies and law enforcement have relied heavily on NSA signal intelligence via low-level intelligence exchange and it has become more and more clear that this is a dangerous dependence. In a sense, the turn towards codifying and legalizing surveillance had already started with the Snowden revelations because at that time many people realized that the usual practices were basically illegal and wanted more legal certainty. At the same time, companies like Apple have increased device security a lot over the past decade.

That's my take on it. I'd love to hear other explanations. It's indeed curious why so many EU countries are pushing for increased surveillance so heavily.