Always check the currently on your board. If you have never updated past EMUI 10, stick to 10.0.0.x board firmware. If you took a HarmonyOS update, only service center tools can revert you.
High-capacity backups (approx. 6.8GB) exist for deep partition recovery, including OEMinfo and certificates. stk-l22 board firmware
For hard-bricked boards:
The STK-L22 variant typically features the or Kirin 710F chipset, depending on the region. Standard firmware versions include: Always check the currently on your board
