rear sensors

Hello anyone have an experience like this? I am getting messages that the rear braking and parking assist are not available when I start my 2021 platinum. Once started, lane departure, intelligent and adaptive cruise work just fine. But, I am no longer getting the colored (green/yellow/red)...

I have owned my 2008 Mountaineer since new. I really like it and want to get some info on fixing some current issues. (1) the deploying running boards on do so on the drivers side and I would like to fix the passenger side and not pay $1600 bucks to do so. (2) my rear back-up sensors are not...