Norway has achieved herd immunity. They have a 77% vaccination rate add in 20% or more with natural infection immunity and they have reached the 90%+ threshold for herd immunity they rightfully should go back to normal they succeeded. I guess you missed the 77.4% total population vax rate.
The problem is that the 77% who were vaxxed do not have immunity.
Even the most fanatic pro-vaxx types around here acknowledge the vaccine does not give immunity to anything.
Another factor that needs to be mentioned is that Norway has the highest average Omega-3 index in the world. There are studies which show that people with a higher Omega-3 index are less likely to have a critical illness or die from Covid. Norway has had 186,000 cases and 850 deaths which is probably the lowest death rate in the world.