pmOS does support recent phones, provided that they can be bootloader-unlocked - and that's only a few brands these days.

Right now, their wiki page on device support [0] lists zero actual devices as "fully supported":

> These are the most supported devices, maintained by at least 2 people and have the functions you expect from the device running its normal OS, such as calling on a phone, working audio, and a functional UI.

> Besides QEMU devices, this is currently empty. The ports we had here earlier weren't as reliable as we would have liked. We plan to add new devices here with a higher standard.

The most recent smartphone in the Community section of that page is the Fairphone 4, released half a decade ago, in 2021. Pixel devices can trivially be bootloader unlocked, but that doesn't make the work that goes into supporting them much easier: the latest device in Testing is the 6a/6 Pro, from 2022, and its device page lists all the features but the most basic (touchscreen, flash, internal storage) as "Untested".

[0] https://wiki.postmarketos.org/wiki/Devices