Magisk manager not detecting magisk installation

Device: itel A11, Android 6 Before the installation of magisk v22, my magisk installation was working fine, so I updated the magisk through direct installation and rebooted my phone but magisk manager wasn't detecting magisk. I tried flashing magisk on my boot image and flashed the patched image with fastboot and spd flash tool but magisk manager wasn't still detecting magisk. I updated to the latest canary version and tried the same thing but to no avail, so I tried flashing my stock ROM but replaced my boot image with the patched boot image still nothing. Today I came across this thread https://android.stackexchange.com/questions/231184/magisk-issue-device-rooted-but-magisk-not-installed?newreg=60441132722b41c0ae20cf4474d5477c that shows exactly the problem I have and he solved the problem by uninstalling the repackaged magisk manager, but now my problem is I flashed my phone and I doubt if the repackaged magisk manager will still be in the phone but why is magisk manager not still detecting magisk