You might be SOL on a 2015. CodeMyBimmer offers an ID6 retrofit for 2016 M235's but not, apparently, for a 2015:
https://www.codemybimmer.ca/shop/?v=3e8d115eb4b3
You may also want to look at this thread:
https://f30.bimmerpost.com/forums/sh....php?t=1361948
steve@codemybimmer may be able to clarify.
Bimmer-Tech also apparently offers some similar retrofits but they source from the EU so you would lose some NA functionality (eg. SiriusXM).