Android Auto was released in 2015, which only ran on a handful of OEM head units: https://www.theverge.com/2015/3/19/8259565/google-launches-a...
In late 2016, Google allowed it to be run on-phone: https://web.archive.org/web/20161107221224/https://blog.goog...
It's really just my opinion that Apple wouldn't go out of their way to port software to a different platform with no PR-friendly purpose.