Possible to use the Pinephone as a PC?

[Pinoideae]

It's possible. Although it is not yet fluid enough. Look at this video:
https://www.youtube.com/watch?v=DD_UNwRGFsU&t=120s

I was not able to reproduce that.
My Monitor made by Acer which works perfectly with HDMI input together with _all_ other hardware I have, was not recognized by the USB-dock.

As indicated in the video, to activate the "Desktop mode" the image provided on this page was used: https://xnux.eu/p-boot-demo/. Among the multiple distributions that this contains, I have used "pmOS / Plasma Mobile" that appears in the video. However, the "KDE Neon" distribution contained in the same image works even better.

I got very excited when you said "KDE Neon"! That's what I'm currently using on my laptop.

When you say it's not fluid, do you mean that it can't really be reliably used as a laptop just yet?