If TWRP isn’t available for your Android 9 device, you can use the itself to patch the boot image.
20 minutes. Risk level: Low to Medium (warranty voided on some devices, but reversible). android 9 root apk
While you might be looking for a simple APK, the most stable method involves using an APK in conjunction with a PC. This is the standard workflow for rooting Android 9 Pie. If TWRP isn’t available for your Android 9
But here’s the critical truth you need to understand before clicking a single download link: android 9 root apk