You just want to remove bloatware. You can disable apps via ADB without unlocking the bootloader ( pm disable-user --user 0 com.huawei.bloat ).
: Visit Huawei's official bootloader unlock page (or the relevant page for your region) and follow the instructions to request an unlock code. You might need to provide your device's IMEI and other details. How to Unlock Bootloader in HUAWEI MediaPad M3 ...
Unlocking the bootloader on a HUAWEI MediaPad M3 in 2026 is but is technically achievable using the PotatoNV exploit. This method is preferred because it requires no payment and works on most BTV-W09 (Wi-Fi) and BTV-DL09 (LTE) units still running Android 7.0 or lower. You just want to remove bloatware
If you require a custom ROM or Root access, check XDA Developers forums for your specific model number (BTV-DL09 or BTV-W09) to see if specific exploits or methods have been discovered recently. You might need to provide your device's IMEI