What kind of car (make/model/year) and what kind of phone? If the car is less than 10 or so years old, it probably works with Android Auto and/or Apple CarPlay.
Now, our Prius DOES have a physical “AUX” jack and matching button choice on the dash/radio panel. We can play music into that port that lives under the shared armrest.
I’m posting this search because that mini headphone jack has gone off and any dongle someone might suggest will be MUCH cheaper and much easier to use than the cost of having someone rip that armrest console out to replace that panel-mount headphone jack.
It doesn’t look like the 2010 Prius has Android Auto, at least that’s what I’m assuming based on the ‘I installed a head unit with Android Auto’ threads that popped up. I wonder what happens if you use a USB to 3.5mm (Aux) jack cable?
If it was me, for $7, I’d try it without even doing more research.
Something like this will allow you to use your cars fm radio to accept almost any kind of input, and is much easier than ripping out the existing head unit. It’s less elegant, but a lot cheaper and easier.
Full disclosure; I have not used one of these before.