Yes, but you will miss the bug fixes mentioned earlier. Only do this if your unit becomes unstable and you need to roll back.
: Addresses specific glitches in the MCU (Microcontroller Unit) and CANBUS system communication. How to Update k2001n nwd firmware 2021
The 2021 firmware still comes with bloatware. Use ADB (Android Debug Bridge) or an app like System App Remover (root not always required) to disable: Yes, but you will miss the bug fixes mentioned earlier