This bug was fixed in the package xdg-desktop-portal-lxqt - 0.4.0-0ubuntu2
--------------- xdg-desktop-portal-lxqt (0.4.0-0ubuntu2) mantic; urgency=medium
* Add a Provides for xdg-desktop-portal-backend (LP: #2036098).
-- Simon Quigley <email address hidden> Fri, 22 Sep 2023 11:51:42 -0500
This bug was fixed in the package xdg-desktop- portal- lxqt - 0.4.0-0ubuntu2
--------------- portal- lxqt (0.4.0-0ubuntu2) mantic; urgency=medium
xdg-desktop-
* Add a Provides for xdg-desktop- portal- backend (LP: #2036098).
-- Simon Quigley <email address hidden> Fri, 22 Sep 2023 11:51:42 -0500