Yyup, notmuch doesn’t sync folders AFAIK since it is an indexer (a fast one), one needs mbsync and/or imapnotify to keep mail up to date (the combination might be mbsync to sync on boot, and then imapnotify to keep things up to date based on such notifications) to keep mail up to date. Another options is khard which is menat for cardav contacts just as khal is meant for caldav calendar… mutt-ics sounds great for ics calendar invitations, which I sometimes get from non family and non organization parties, otherwise I receive caldav ones, which I’d like to integrate with the caldav calendar so it syncs, perhaps mutt-ics handles that as well, first time reading about it, :)

Many thanks for answering !