I’ve managed to root the tablet using Systemless root.
the steps to root it are :
- get a rooted android device of the sameĀ CPU architecture
- Extract the Magisk zip file provided from XDA.
- copy the contents of the COMMON folder and the folder of your architecture
- prepare the boot.img file of the device you wish to root.
- transfer the prepared files into a writable folder of your spare rooted android device ( eg: /data/local/tmp)
- Using ADB. grant run permissions to boot_patch.sh and run it: boot_patch.sh boot.img
- a boot-new.img should be generated. Use adb to pull it out.
- Flash the new boot img to your phone.
it was taken from over here:
Rooting without custom recovery