You just want to remove bloatware. You can disable apps via ADB without unlocking the bootloader ( pm disable-user --user 0 com.huawei.bloat ).
Because Huawei actively blocks bootloader unlocking, only is recommended for 99% of users. Methods 2 and 3 are obsolete or dangerously complex. Conclusion Unlocking the bootloader on a HUAWEI MediaPad M3 in 2024-2026 is a testament to Android's open-source spirit, but it requires money or mad soldering skills. If you choose the paid route, you will have a $20 expense and 10 minutes of work. If you choose the free route, prepare your screwdriver and a prayer. How to Unlock Bootloader in HUAWEI MediaPad M3 ...
After unlocking, never relock the bootloader ( fastboot oem lock ) unless you are 100% sure you are on stock firmware. Relocking with custom software is a guaranteed brick. You just want to remove bloatware
Good luck, and long live the Kirin 960.
Unlike OnePlus or Google Pixel devices, Huawei shut down its official bootloader unlock portal in May 2018. This means there is method to unlock your MediaPad M3 today. Methods 2 and 3 are obsolete or dangerously complex