The codename "Be6" refers to a specific hardware revision of a Tecno Spark model. While generic MediaTek DA files exist (like MTK_AllInOne_DA.bin), they rarely work perfectly on newer or locked-down devices. Tecno, like many manufacturers, has started implementing and DA authentication to prevent unauthorized flashing.
Use the tool corresponding to your chipset (e.g., SP Flash Tool for MTK variants). Load the Scatter/PAC File: Tecno Be6 Da File
ADB/TWRP: