It is widely reported, e.g. here, that the Diocese of Rome has banned the pre-Vatican II liturgy during the Easter Triduum in the implementation of Pope Francis’ motu proprio Traditionis custodes. It is also prohibited in Rome to celebrate other sacraments and sacramentals except Mass from the pre-Vatican II missal. In accord with the motu proprio, any priest who wishes to celebrate the preconciliar rite must secure permission from the diocese. The readings at such Masses must be proclaimed in the Italian translation approved by the Italian bishops.
A Pray Tell reader helpfully points out that the meaning of “Easter Triduum” has changed since the liturgical reform. Previously the reference was to “Triduum ante Pascha,” which did not include Easter Sunday. Now, the Easter Triduum begins with the Thursday Mass of the Lord’s Supper and concludes with Vespers (Evening Prayer II) of Easter Sunday.
The significant of this is that the recent decree from the diocese of Rome most likely does not prohibit the pre-Vatican II Latin Mass on Easter Sunday in the diocese of Rome.