Translations:Steam/152/en
From Gentoo Wiki
They are "not in the search path set by the XDG_DATA_DIRS environment variable, so applications installed by Flatpak may not appear on the desktop until the session is restarted".
They are "not in the search path set by the XDG_DATA_DIRS environment variable, so applications installed by Flatpak may not appear on the desktop until the session is restarted".