LXQt is in my view ideally suited for the Pinebook and other SBC.
However a small niggle that I had is that for the Pinebook and other SBC there is no easy way to change display brightness in LXQt.
So now I have two ideas that solve it mostly in my view.
You can add the brightness config programme to the quicklauncher.
Usually you would expect some brightness setting in the system tray at the end of the task bar, but apart from that the brightness adjustment works nicely from the quicklauncher.
You can add it like other programms. Open the file manager, move to folder
/usr/share/applicationsand drag and drop the brightness icon to the quick launcher.
Once you see the brightness setting as individual programme rather than part of the config, you can also define a keyboard shortcut.
Open the LXQt settings -> Shortcut keys, add a new entry, press the Shortcut button to define a keyboard shortcut of your choice (mine is Shift-Super-b), add a description and then add the command
Now if you want to adjust the brightness press your keyboard shortcut and adjust the brightness with arrow-left and arrow-right. Esc closes the brightness setting.
So that's is, works for me.