Rotate the screen 90°

i can’t find rotate the screen this function

Hi, Android 9’s TV version only supports 240 degree screen rotation. You can use Android 9’s tablet version, which can meet your needs.
Android 9’s tablet version settings screen rotates: Tuner Settings ==> Display ==> HDMI ==> Rotaion.

Oh, sorry, it supports 180 degrees of rotation, not 240 degrees.