After reboot, open app and it will say to install driver, click ok and give it root permission and phone will reboot.
After reboot ViPER is ready to use

Tutorial
From ViPER4FX telegram channel

ViPER4Android FX [Non Root]

Requirements
-- android 10, arm 64
-- custom recovery
-- ViPER4Android rootless zip file
-- ViPER4Android apk

Instructions
-- Uninstall magisk using magisk uninstaller
-- Flash ViPER4Android rootless zip in custom recovery
-- Wipe cache and dalvik
-- Reboot
-- Install apk
-- Enjoy

Downloads
ViPER4Android Rootless
ViPER4Android APK

Screenshots

Tutorial

Credits