Yes, this obligation continues to apply. However, other federal states have already abolished the obligation to isolate. According to Health Minister Köpping, the state government has so far refrained from taking this step because the regulations would otherwise become even more complicated. For example, federal states without an isolation obligation have set requirements for infected people.
For example, Thuringia has determined that people infected with corona are “generally required to wear masks” outside their own homes and are not allowed to enter care facilities and hospitals. These guidelines should follow for five days or at least 48 hours after the end of the symptoms. According to the information, the restrictions end without symptoms after ten days at the latest.