Titanium Backup contains a "Clean up the Dalvik cache" feature and a dedicated "Un-root" button under the "Problems?" menu. It detects whether you have SuperSU, Magisk, or even old Bin4ry root. It then creates a script to surgically remove root binaries and restore default permissions.
Simultaneously, unrooting is becoming easier because Magisk is now the de facto standard. Over 95% of all rooted devices today use Magisk. You do not need a universal tool; you need the Magisk uninstaller. universal unroot.apk
To understand why a universal APK is mostly a myth, you must understand the three distinct eras of root. Titanium Backup contains a "Clean up the Dalvik
Here is the hard truth: