In addition to the lack of CoV tests, those rejected either had no digital travel registration or were not among the exceptions for entering Germany – such as doctors and nursing staff.
The German government had declared the Czech Republic, Slovakia and large parts of Tyrol in Austria to be so-called virus variant areas. Since last Sunday, only Germans and foreigners with a residence and residence permit in Germany have been allowed to enter from there.
The re are exceptions for truck drivers and cross-border commuters with systemically relevant professions. You must have a negative test that is no older than 48 hours.