The user wants to install Google Play Store on their Chinese market Mazda EZ6 to access more apps and purchase the pro version of apps.
All thanks to some tech-smart Deepal owners in China, who presumably got fed up with being fed ads on the screen in their brand new cars. They managed to crack their Android-based infotainment, then removing bloatware and adding their own apps. Turns out the 6E's infotainment is really similar to the Deepals, so here we are. Got a bluetooth OBD dongle plugged in, and the app on the screen is Car Scanner ELM OBD2. Still works even if I have my phone paired to the screen, though latency gets a bit bad. Can't install Google Play (yet), so you can't buy the pro version of the app. It's a little risky though, I installed Youtube Revanced, opened a video and the screen froze almost immediately, had to force restart by pressing the three buttons on the steering wheel. Solved it by disabling the floating video playback screen that appears when you swipe Youtube Premium into the background. Got some other map apps working too!