On the Ubuntu laptop:-
root@t470:/# ls -al /etc/xdg/lxqt/ total 12 drwxr-xr-x 2 root root 4096 Jun 18 00:37 . drwxr-xr-x 10 root root 4096 Jun 18 00:37 .. -rw-r--r-- 1 root root 657 Oct 21 2017 globalkeyshortcuts.conf
on the Debian one I also have:- lxqt.conf panel.conf session.conf windowmanagers.conf
On the Ubuntu laptop:-
root@t470:/# ls -al /etc/xdg/lxqt/ uts.conf
total 12
drwxr-xr-x 2 root root 4096 Jun 18 00:37 .
drwxr-xr-x 10 root root 4096 Jun 18 00:37 ..
-rw-r--r-- 1 root root 657 Oct 21 2017 globalkeyshortc
on the Debian one I also have:-
lxqt.conf
panel.conf
session.conf
windowmanagers.conf