I don't know hiw you're trying to root, but this one's easy and works for me:
Flash the dual-core image in fastboot,
Flash a squashfs compatible TWRP in fastboot,
Reboot to TWRP,
Push the (I recommend v13 beta) Magisk.zip to /sdcard,
Install Magisk.
Reboot and you're done.
PS: if your watch...