[Huawei Mate 10  ROMs, Kernels, Recoveries, & Other] :
If we look at the code

[ 20.716247s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]secureboot: preload verify end, lasted 5 ms
[ 20.716247s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]main: module --- hdcp init end, success, lasted 6 ms!
[ 20.716278s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]display: [display]cmi_panel_init: lcd type is not CMI_NT35521_LCD.
[ 20.716278s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]main: module --- panel_lcd_cmi_NT35521 init end, success, lasted 0 ms!
[ 20.716278s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]display: [display]jdi_panel_init: lcd type is not JDI_NT35695_LCD_CUT3_1.
[ 20.716278s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]main: module --- panel_lcd_jdi_NT35695_cut3_1 init end, success, lasted 0 ms!
[ 20.716278s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]display: [display]jdi_panel_init: lcd type is not JDI_NT36860_LCD.
[ 20.716278s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]main: module --- panel_lcd_jdi_NT36860 init end, success, lasted 0 ms!
[ 20.716278s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]display: [display]jdi_panel_init: lcd type is not JDI_NT36860C_LCD.
[ 20.716278s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]main: module --- panel_lcd_jdi_NT36860C init end, success, lasted 0 ms!
[ 20.716278s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]display: [display]jdi_2lane_panel_init: lcd type is not JDI_2LANE_NT36860C_LCD.
[ 20.716278s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]main: module --- panel_lcd_jdi_2lane_NT36860C init end, success, lasted 0 ms!
[ 20.716308s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]display: [display]lgd_panel_init: lcd type is not LGD_NT36870_LCD.
[ 20.716308s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]main: module --- panel_lcd_lgd_NT36870 init end, success, lasted 0 ms!
[ 20.716308s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]display: [display]sharp_panel_init: lcd type is not SHARP_NT36870_LCD.
[ 20.716308s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]main: module --- panel_lcd_sharp_NT36870 init end, success, lasted 0 ms!
[ 20.716308s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]display: [display]lg_TD4322_panel_init: lcd type is not LG_TD4322_LCD.
[ 20.716308s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]main: module --- panel_lcd_lg_TD4322 init end, success, lasted 0 ms!
[ 20.716308s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]display: [display]jdi_panel_init: lcd type is not JDI_R63452_6P0_LCD.
[ 20.716308s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]main: module --- panel_lcd_jdi_R63452_6P0 init end, success, lasted 0 ms!
[ 20.716308s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]display: [display]lg_panel_init: lcd type is not LG_TD4322_6P0_LCD.
[ 20.716308s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]main: module --- panel_lcd_lg_TD4322_6P0 init end, success, lasted 0 ms!
[ 20.716339s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]display: [display]sharp_panel_init: lcd type is not SHARP_TD4322_6P0_LCD.
[ 20.716339s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]main: module --- panel_lcd_sharp_TD4322_6P0 init end, success, lasted 0 ms!
[ 20.716339s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]display: [display]fake_panel_init: lcd type is not UNKNOWN_LCD.
[ 20.716339s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]main: module --- panel_lcd_fake init end, success, lasted 0 ms!
[ 20.716339s][pid:1,cpu7,swapper/0]last_bootloader_log: [3056 ms]display: [display]lcdkit_init: lcd type is LCDKIT.
[ 20.716339s][pid:1,cpu7,swapper/0]last_bootloader_log: [3077 ms]display: [display]get_dts_value: get huawei,lcd_panel_type, iovcc_ctrl_mode=1!
[ 20.716339s][pid:1,cpu7,swapper/0]last_bootloader_log: [3084 ms]dtimage: -----can not find iovcc_ctrl_gpio
[ 20.716339s][pid:1,cpu7,swapper/0]last_bootloader_log: [3084 ms]display: [display]get_dts_value: can not get huawei,lcd_panel_type, iovcc_ctrl_gpio=0!
[ 20.716339s][pid:1,cpu7,swapper/0]last_bootloader_log: [3084 ms]display: [display]get_lcdkit_id: get iovcc gpio fail
[ 20.716491s][pid:1,cpu7,swapper/0]last_bootloader_log: [3169 ms]display: [display]get_dts_value: can not get ti,lm36274, lm36274_support=0!
[ 20.716491s][pid:1,cpu7,swapper/0]last_bootloader_log: [3169 ms]display: get lm36274_support failed!
[ 20.716491s][pid:1,cpu7,swapper/0]last_bootloader_log: [3169 ms]main: module --- lm36274 init fail, return -1!
[ 20.716491s][pid:1,cpu7,swapper/0]last_bootloader_log: [3169 ms]main: module --- lm36274 init end, failed, lasted 8 ms

<6>[ 20.716491s][pid:1,cpu7,swapper/0]last_bootloader_log: [3176 ms]display: [display]get_dts_value: get huawei,lcd_panel_type, bl_bus_id=3!

there seems to be a display issue. (which is telling it cannot get the display type.)

Not sure if this helps. Neither I'm sure why this doesn't work on regular mate 10. Since it is backported from mate 9 [emoji848]

Looks like it fails to get info about display?