Release the buttons once the update process starts automatically on the screen.
Repack firmware often contains the official, verified Huawei/Honor firmware files ( update.app and update_all_hw.zip ) but packaged for easier access through flashing tools. When Do You Need to Flash Firmware? You should consider re-flashing or updating your Honor Pad X9 firmware if you experience: Bootlooping: The tablet is stuck on the Honor logo.
This process is complex and carries risks. It is designed for advanced users.
For most users, sticking to official "Tryout Versions" found under System & Updates