Blind spot detector for lane change

Though my car has ADAS and the cameras, it doesn’t have the blind spot warning when changing lanes that all other cars I own have… does anyone know if this can be a retrofit?

 

So it’s not possible to retrofit. But they are looking into the wide angle camera inside mirror. I’ll probably just have to go back to old school looking which is fine

 

This is the unit I’m talking about: https://www.ferrari.com/en-EN/auto/genuine/ferrari-296-gtb/inner-digital-mirror

the SF90 guys say it’s not great so let’s see the cost and then we’ll decide