Play along - create a PinePhone keyboard

[x0r]

But stil 4 in vertical, why not 5 or 6 (similar in normal keyboard)?

I agree. Something like the keyboard of GPD Win might be good. It has 5 rows and common symbols don't need the Fn key. I just hate the Fn key being at the left most position. Should switch Ctrl and Fn.

5*18
if reducing a size key, some key put outside (edge the phone) and add one line it will be great. (In chocolate/Planck layout)

I hate Fn too, Fn+PgUp too.