I saw others suggest that you can use Android 9 on a NanoPi from the official Radxa images for the Rock Pi 4. Is this actually true and fully compatible? I'm thinking about buying a NanoPi M4B because it'll fit my current setup a lot better than the Rock Pi 4 but having the option to use Android 9 with the PlayStore would be a huge plus compared to the official Android 8.1 image.

So if I installed the Rock Pi 4 image, can I expect it to fully work and everything to be 100% compatible?