If the PinePhone does not have the exact
same apps that you will find in the Play Store or App Store, then it is not a viable replacement for the Pixel 2 user, unless they are Linux fans or enthusiasts.
It's easier to get a new Pixel device or iOS device, but this duopoly really needs a credible alternative and the PinePhone is really not an option unless it has the latest Android and can run the same Android apps without the hassle.
Looking at the list of OSes it supports, it just slapping on Linux distros running on a tiny screen. That tells me its for Linux enthusiasts and that's too bad. I'd rather buy and iPhone 12 or a new Pixel device when they both come out than to do this ROM flashing business like its 2010.