Since tablet mode is explicitly blocked for KIONIX Accelerometers in the linux kernel, I have created a userspace driver that will toggle tablet mode based on accelerometer readings:
https://github.com/MadhiasM/TeclastF6ProTabletMode
Tested on Zorin OS working good, with some improvements to be done for edge cases like sideways orientation, which is difficult due to aligned orientation of x-axis of the two accelerometers in that case, making different hinge positions indistinguishable. But for 99% of positions it works good.