Something in Germany is way off kilt. The rules for each state are different for Covid. The federal laws gave each state the ability to mandate rules based on their own needs. Which does make sense, but it leaves a huge gap of information when traveling.
Right now, some major cities say that you are not required to wear a mask, but that is not a state rule. Distancing numbers are also different in each state.
The testing vaccine is being given out, but only to certain groups of people. Then there are delays for multiple reasons.
Each week there are new stories in the news, and people are trying to understand what location theses latest news updates apply too, for how long.
So, if you are looking for easy to get facts on locations in Germany for covid updates, it is complicated. If you are coming from another country, you might have to quarantine yourself. Some people have to quarantine even if they had the vaccine. Some are free to go as soon as they enter the country.