Comment by jeroenhd

There's a list of SoC's here: https://wiki.postmarketos.org/wiki/Mainlining#Supported_SoCs

Having basic SoC support doesn't mean you can just flash a kernel and expect the device to boot, though.

The tooling itself actually does most of the work for you. Things like compiling the kernel and building and flashing the install image pretty much happen automatically once you've copied over a template and edited the necessary sources.

You can probably boot pmOS if you copy a template for a device with the same CPU but if there are no similar devices, you're on your own. Even if it does boot, there's a good chance you end up in a "no display, no USB, no wireless, no sound" scenario where the kernel runs but won't be doing anything useful. Just having CPU support isn't enough, you'll probably need the appropriate device tree definitions and possibly kernel drivers which you may be able to lift from the Android kernel if your device came with that.

Very few Android SoCs have upstream support that even comes close to what the Apple M1 has, let alone an amd64 CPU. The new Snapdragon Extreme chips are very different in terms of design and in terms of how Qualcomm approaches them, and even their support is lacking in practice.