Thing 1.06's supported app list only looks for desktop files for Libreoffice in /usr/share/applications and only named in the format libreoffice-(app).desktop when deciding whether Libreoffice categories should be available in it's dropdown.
This naming convention is used in Libreoffice installed as deb from the ubuntu repos, or the official Libreoffice PPAs.
Users that remove the stock installed Libreoffice and install Flatpak Libreoffice have no Libreoffice categories available in Thingy. The desktop files are in /var/lib/flatpak/exports/share/applications/ and are named in this format org.libreoffice.LibreOffice.(app).desktop
Users that remove the stock installed Libreoffice and install via the debs available from https://www.libreoffice.org/download/download/ have desktop file in /usr/share/applications but named as libreoffice(version)-(app).desktop - e.g libreoffice7.3-writer.desktop. Thingy again fails to display Libreoffice categories.
Finally users with an Appimage version of Libreoffice only don't have desktop entries at all unless they create them. Not sure if they can be supported without thingy adopting a different method of deciding the categories available.