Another useful thing is to turn off the phone screen and use only the dock one while plugged, I was trying to do it nicely for a while, you can see the discussion here Initial Librem5/Nexdock360 impression but now I just created a .desktop file that calls a script to disable the phone display when open using wlr-randr --output DSI-1 --off then to go back to the phone I just unplug it and it crash and reload phosh to the phone display, not ideal but it works.
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