Hi. There is the emulator option, which is what I would recommend at this time.
There is a POC 16 KB Pixel 6/6 Pro build available, though it's aimed at platform developers, and several OS components will be failing and some hardware does not work in this mode.
I do not recommend it compared to the emulator unless you are familiar with Android platform development:
https://source.android.com/docs/core/architecture/16kb-page-size/flash-pixel6-with-16kb-kernelFor a developer option quality build, you should not expect it on devices older than Pixel 8. Though I can't share schedules for other devices at this time, thank you for your interest in 16 KB!