Prius+ 2012 rear bike rack

I was googling for a read mounted bike rack for my Prius+ and got some sites with response that they do not offer this kind of mount as the car is not suitable or structural strong enough. Same if I would go with a tow-bar. I know, I cannot tow, but that would be good enough to fit a bike rack on the hook. Has anyone here fitted some bike rack on the rear? I'm looking to transport 3-4 bikes.

You may want to check with some specialists. There is a tow bar that can be installed on the Lexus CT (which is also based on a gen3 Prius) for this specific purpose. We have that on our Lexus and a Thule tow bar bike rack - complete with number plate and lights. Works really well.