Another tidbit from
the official JapanExpo reveal stream, they bargained first for 5 NijiEn, then Niji asked them if they could handle simultraduction JP-FR and then shipped the 5 others but they are still negotiating for their q&a appearance day, so that probably mean they will not be flying there (and that their schedule is still a mess on niji side, several livers misunderstood the availability date)