Because the system is not functional.
Xiaomi system does not have the function of saving pictures after rotating them, but Shi Meiyu solved it.
In 2021, Xiaomi submitted a new patent to the World Intellectual Property Organization, which shows a detachable rear camera design. According to the patent report, the patent has a variety of rear camera module designs, including magnets, receivers, wireless transmission and other components, and adopts a detachable design. The detachable camera module can be attached to the top of the phone using magnets. The patent image shows two types of rear camera modules: round and oval, which may mean that the detachable design will be suitable for various camera modules.