Carrier-grade NAT for home connections is pretty rare in Germany. I only know of Deutsche Glasfaser - a fairly new ISP that isn't doing too well.
Vodafone cable's cgnat struggles. I went v6 for home so that at least the v6 sites and my own connections avoid the congestion.
It's very common. German ISPs collectively went with DS-Lite, so most of that 77% with v6 have CGNATed v4.