Binary package “libreoffice-gtk4” in ubuntu mantic

office productivity suite -- GTK+ 4 integration

 LibreOffice is a full-featured office productivity suite that provides
 a near drop-in replacement for Microsoft(R) Office.
 .
 This package contains the Gtk plugin for drawing LibreOffices widgets
 with Gtk+ 4 and Gtk/GNOMEish print dialog.
 .
 You need to enable it manually by export SAL_USE_VCLPLUGIN=gtk4.