Play along - create a PinePhone keyboard

[SwordfishII]

There is one thing I'd like to add though; since it might be desirable to use legacy X11 applications on a PinePhone (unlike on a Jolla Phone) 

A solution I used on a Linux tablet that only had a keyboard was keynav and a custom keybinding that initialized on startup.

Here is a video about it that someone made.
https://m.youtube.com/watch?v=OkOb2aD-dVg

Basically it sets up a 4 square grid. If you cut right it turns the right two grids into 4 grids (one move eliminated half the screen) again using a direction, up, down, left or right you reduce that half by another half. You can keep going if you want but the goal is to have the center + where you want the mouse to go. Then you use a designated mouse click button and the mouse moves to that spot and either right, left or center clicks.

It sounds confusing but it is really simple and useful if you don't have/want a mouse.

The video shows the default bindings but it's easy to change them. He also cuts more than he has to but it shows how accurate it is.

It works surprisingly well and quickly, although gaming is definitely out.