app-text/xournal is currently in tree, but development now occurs on the xournalpp project at https://github.com/xournalpp/xournalpp
https://repology.org/project/xournalpp/versions You can test and improve this ebuild for a start. https://gpo.zugaina.org/app-text/xournalpp
That ebuild is working fine for me. It could be improved with a USE flag for latex, but otherwise it seems fine.
Is already added.