On this page
1. Turn on Developer options
Open Settings.
Go to Settings, then About phone, then Software information and tap Build number 7 times.
Enter your PIN if asked. You see You are now a developer!
Developer options is in Settings, then System, then Developer options.
Turn on USB debugging.
Sources: ROG support, ASUS support
2. Extra switches this brand needs
None.
Sources: ASUS support
3. Pair and start
Follow the Wireless debugging steps. On a computer instead? The computer steps.
Sources: Shizuku setup guide
4. Keep Shizuku from stopping
Newer ZenUI: Settings, then Apps, then Shizuku, then App battery usage, then Unrestricted.
Older phones with Mobile Manager or PowerMaster: untick Clean up in suspend and
Auto-deny apps from auto starting.
Also do the four steps every phone needs: unrestricted battery, Disable adb authorization timeout, No data transfer as the USB default, and leaving debugging on. They are on the Wireless page.
Sources: Don't kill my app: ASUS
5. Known problems on ASUS Zenfone and ROG Phone
No ASUS specific problems found
Use the fixes by symptom.
Sources: Shizuku setup guide
6. Turn it all back off
First, in each app that used Shizuku, undo what it changed, while Shizuku still runs. Some changes an app makes through Shizuku stay after Shizuku stops. Firewall and Fileglow have their own steps.
In Shizuku, switch off every app in the list of authorized apps.
Stop Shizuku with its stop option, or restart the phone.
Open Developer options, then Wireless debugging, then Paired devices, tap the shizuku entry, then Forget.
In Developer options, tap Revoke USB debugging authorizations. This removes every paired computer and device.
Turn off Disable adb authorization timeout if you turned it on, and set Default USB configuration back to File transfer if you want.
Turn off Wireless debugging, then USB debugging.
Turn off the switch at the top of Developer options: Settings, then System, then Developer options.
Set Shizuku's battery setting back to the default (Optimized) if you like.
Uninstall Shizuku the normal way if you don't need it any more.
Sources: Shizuku setup guide, Android adb docs, Android developer options docs, Issue 467, Issue 451, Discussion 1000