SBUS vs PPM RCIn inversion

Just to leave some final conclusion.
Potential pins for PPM are as follow (those configs build without errors).

USART2 PA3 TIM5 CH4
USART4 PA1 TIM5 CH2
USART6 PC7 TIM8 CH2

last one is original location for serial RCIN, so its perfect PPM input.