https://static.nhtsa.gov/odi/tsbs/2018/MC-10130285-9999.pdf
This site defines which radios were available on various models from 2014 to 2018. It is very detailed and even includes diagnostic info for apps on each radio.
If you're thinking about swapping an OEM radio for another OEM radio then this site has all the info you need.
PS- I swapped the OEM radio in my 2017 Premium for an OEM radio with Nav successfully. All I needed was the correct radio and a GPS antenna. And, YES, the turn info (direction and street name) does show up on the dash without any additional programing or hardware.