In August 2017, the SSPX Bishops made a prayerful act of consecration asking Our Lady to speed the day when the Holy Father Consecrates Russia to the Immaculate and Sacred Hearts. https://sspx.org/en/news-events/news/act-consecration-russia-immaculate-heart-mary-31607
Hi Xavier,
You should write to the Superior General and encourage as many SSPX priests and parishioners to write to him also, demanding that the first condition before starting any dialogue or coming to any agreement is the release of the entire 3rd Secret and the Consecration of Russia in union with the Bishops, etc.