Can I use Android Auto / CarPlay for DMD2?

No. These are streaming devices, which means it will be your pocket device streaming the app.

Not only you are limited by the fact you need an AA or CP compatible app but also by the AA/CP version of the app, AA/CP app versions are not the same as when you run the app natively, you usually get a stripped down version of the app where A LOT of its features are missing and they use totally different and limited UIs.

Although this system might be useful in your car or even on a motorcycle if your doing single day shorter rides, this is not a good solution for adventure riding. In addition, your streaming device (your phone) will discharge much faster, you will not be able to use handlebar remotes and, the DMD2 application will certainly not work.