Ad Deum: Syro-Malabar Rite
There are 23 other rites of the Catholic Church; the Roman Rite is the original and largest, by far. However, the next oldest rite of the Catholic Church is the Syro-Malabar, which was started by St. Thomas the Apostle.
In 1999, all of the bishops of the Syro-Malabar rite came together in a synod. In a unanimous decision of all of the bishops, they removed the practice of versus populum. Due to some rebellious priests, there are still hold outs. Even after being reprimanded, they are obstinate, so much so that Pope Francis in 2021 called on them to make all of their Masses ad Deum. Some of those disobedient priests have continued in spite of the Holy Father's plea, so he has called out to them again in a stronger way.
(Picture is in the Crypt of St. Peter Basilica)