Installing a custom ROM on the Huawei MatePad 10.4 is extremely difficult because Huawei officially stopped providing bootloader unlock codes in 2018. Without an unlocked bootloader, you cannot "crack" the device to install third-party operating systems like LineageOS or Pixel Experience. Current Status and Technical Barriers Locked Bootloader:
: Major developers like LineageOS generally do not support newer Huawei devices. Third-Party Tools huawei matepad 104 custom rom cracked
Conclusion
Since a stable "cracked" custom ROM for the MatePad 10.4 does not currently exist, most "interesting" research focuses on debloating or virtualization: Installing a custom ROM on the Huawei MatePad 10
Introduction