here is log
unlock and read cert12:06:18 PM - Selected SOC/Loader : Huawei & Honor HiSilicon|Kriin 710F
12:06:18 PM - Interface : COM46
12:06:18 PM - Waiting for Phone..
12:06:18 PM - Configuring Device Mode..
12:06:18 PM - Writing Boot Block [1 of 1]..
12:06:21 PM - Verifying ok..
12:06:21 PM - Writing Boot Block [2 of 2]..
12:06:24 PM - Verifying ok..
12:06:24 PM - Writing Boot Block [3 of 3]..
12:06:26 PM - Verifying ok..
12:06:26 PM - Selected Storage : Auto
12:06:26 PM - Reading Partition Table..
12:06:26 PM - Partition Count : 71
12:06:26 PM - Userdata : 116.48 GB
12:06:26 PM - Detecting Frp Signature..
12:06:26 PM - Frp Signature Found..
12:06:26 PM - Removing Frp Lock..
12:06:28 PM - Frp Remove Okay..
12:06:28 PM - Note : please press and Hold power On button!..
12:06:28 PM - Note : Hold for 10-15 Seconds for device powering ON!!!
12:06:28 PM - Done..
UnlockBoot Loader
12:17:32 PM - Selected SOC/Loader : Huawei & Honor HiSilicon|Kriin 710F
12:17:32 PM - Interface : COM46
12:17:32 PM - Waiting for Phone..
12:17:32 PM - Writing Boot Block [1 of 1]..
12:17:35 PM - Writing Boot Block [2 of 2]..
12:17:37 PM - Writing Boot Block [3 of 3]..
12:17:40 PM - Selected Storage : Auto
12:17:40 PM - Reading Partition Table..
12:17:40 PM - Partition Count : 71
12:17:40 PM - Userdata : 116.48 GB
12:17:40 PM - Writing Patch Block 1.0
12:18:26 PM - Waiting for Phone..
12:18:26 PM - Writing Boot Block [1 of 1]..
12:18:29 PM - Writing Boot Block [2 of 2]..
12:18:31 PM - Writing Boot Block [3 of 3]..
12:18:33 PM - Writing Boot Block [4 of 4]..
12:18:36 PM - Writing Boot Block [5 of 5]..
12:18:53 PM - Waiting for Phone in (Fastboot)
12:18:58 PM - Comunicating..
12:18:58 PM - Model : STK-L21
12:18:58 PM - Build : STK-L21M 10.0.0.420(C185E7R6P1)
12:18:58 PM - Android Version : 10
12:18:59 PM - Build : STK-L21M 10.0.0.420(C185E7R6P1)
12:18:59 PM - Base Version : STK-LGRP6-OVS 10.0.0.420
12:18:59 PM - Preload Version : STK-L21M-PRELOAD 10.0.0.1(C185R6)
12:18:59 PM - Custom Version : STK-L21M-CUST 10.0.0.7(C185)
12:19:00 PM - Key Version : huawei_key_v1
12:19:00 PM - HW Version : Ver2.3
12:19:00 PM - Dongle Info : dongle_info RSA-2048,0x9001,0x7000,0x6000,0x5100,0x5000
12:19:00 PM - Chip ID : chipid 62601100
12:19:00 PM - Board ID : 4C6FRS196F079659
12:19:01 PM - Board ID : 4C6FRS196F079659
12:19:01 PM - Vendor Country : vendorcountry hw/meafnaf
12:19:01 PM - Bootloader : UNLOCKED
12:19:01 PM - Done..
-------------------------------------
Read Certaficate
12:22:31 PM - Selected SOC/Loader : Huawei & Honor HiSilicon|Kriin 710F
12:22:32 PM - Waiting for Phone in (Fastboot)
12:22:32 PM - Comunicating..
12:22:32 PM - Model : STK-L21
12:22:32 PM - Build : STK-L21M 10.0.0.420(C185E7R6P1)
12:22:32 PM - Android Version : 10
12:22:33 PM - Build : STK-L21M 10.0.0.420(C185E7R6P1)
12:22:33 PM - Base Version : STK-LGRP6-OVS 10.0.0.420
12:22:33 PM - Preload Version : STK-L21M-PRELOAD 10.0.0.1(C185R6)
12:22:33 PM - Custom Version : STK-L21M-CUST 10.0.0.7(C185)
12:22:33 PM - Key Version : huawei_key_v1
12:22:33 PM - HW Version : Ver2.3
12:22:34 PM - Dongle Info : dongle_info RSA-2048,0x9001,0x7000,0x6000,0x5100,0x5000
12:22:34 PM - Chip ID : chipid 62601100
12:22:34 PM - Board ID : 4C6FRS196F079659
12:22:34 PM - Board ID : 4C6FRS196F079659
12:22:34 PM - Vendor Country : vendorcountry hw/meafnaf
12:22:35 PM - Bootloader : UNLOCKED
12:22:35 PM - Starting Read Cert Process..
12:22:35 PM - Reading Cert Info..
12:22:35 PM - Cert File Saved to : C:\DTPRO TOOL\Hisilicon _v5.0.0.009(Nobody)XLOADER\Backup\CertFile_122235193_250723.cert
12:22:35 PM - Rebooting..
12:22:35 PM - Done..