I have unlocked the booloader long before.
I have downloaded and managed to reboot to TWRP. (https://forum.xda-developers.com/p10-lite/development/recovery-twrp-3-2-1-0-t3783447)
I have downloaded supersu zip and "flashed" it with TWRP. (https://forum.xda-developers.com/p9/development/root-supersu-2-81-emui-5-t3612258)
I rebooted P10 lite and start supersu app, it told my no ROOT.
The P10 lite is a Janpanse version WAS-LX2J at EMUI/Android 8.0.0.
I have downloaded and managed to reboot to TWRP. (https://forum.xda-developers.com/p10-lite/development/recovery-twrp-3-2-1-0-t3783447)
I have downloaded supersu zip and "flashed" it with TWRP. (https://forum.xda-developers.com/p9/development/root-supersu-2-81-emui-5-t3612258)
I rebooted P10 lite and start supersu app, it told my no ROOT.
The P10 lite is a Janpanse version WAS-LX2J at EMUI/Android 8.0.0.