How to Install Magisk, Xposed, and TWRP on New Tanix TX6?

[davidw]

It turns out that the stock Android 9 firmware installed on my new TX6 (still not sure if this is real or "fake") is already rooted. There is no root "supervisor" app like superSu or Magisk installed. But root apps appear to work and in a terminal I can su and perform root commands.

But I would like to install TWRP, Magisk (or superSu, I guess) and Xposed. Any tips or tutorials on how to do this?

Thanks

[davidw]

Forget it. I am returning this thing!