The new Librem 13v4 has the same keyboard programming as prior models and as such it suffers from the same pipe key mapping issue. We need to update the same systemd file as in T431 to reference the Librem 13v4 as well:
# Purism Librem 13 V4 evdev:atkbd:dmi:bvn*:bvr*:bd*:svnPurism*:pn*Librem13v4*:pvr* KEYBOARD_KEY_56=43