Really, this is the only disappointing thing about my XC40 Recharge. Google's propensity for taking on big new things, only to lose interest in them after initial development. AAos has been around for almost two years now, and they are not pushing developers to add apps to the platform, heck, they can't even be bothered to put all of their own relevant apps on the platform!
I was so excited for AAos. Google and Apple both clearly have the capability to do infotainment systems better than your average carmaker, but the overall infotainment experience in the XC90 with Android Auto AND Apple CarPlay is vastly superior at this point in time.
The fact that it is taking them this long to add AA and CarPlay functionality indicates that Google has lost all interest in this product. It now makes a lot of sense why one of the German carmaker's (I think VW) announced that they would only use AAos a a temporary solution, while they where developing their own long term solution.