The SSPX has no authority whatsoever to grant annulments. As a matter of fact, as I've said many times before, I believe they are cursed today precisely because they went into the business of granting annulments.
“Right is right even if no one is doing it; wrong is wrong even if everyone is doing it.” (St. Augustine)
"I do not speak rashly, but as I feel and think., I do not think that many priests are saved but that those that perish are far more numerous. The reason is that the office requires a great soul. For there are many things to make a priest swerve from rectitude, and he requires great vigilance on every side. Do you not perceive how many qualities a bishop must have that he may be apt to teach; patient towards the wicked, firm and faithful in teaching the Word? How many difficulties herein.
Moreover the loss of others is imputed to him. I need say no more. If but one dies without baptism, does it not entirely endanger his salvation? For the loss of one soul is so great an evil as no man can understand. If the salvation of one soul is of such importance that, for its sake, the Son of God became man and suffered so much, think of the penalty the loss of one soul will entail". (St. John Chrysostom Third Homily, Acts of the Apostles)
....The SSPX, in crisis of today's Novus ordo conciliar modernism and their plague of destroying the Sacrament of Marriage, along with their cotton-candy abuses of annulments, was forced by souls coming to them who are seeking the Sacrament of Marriage from them necessitated a preparation and an investigation....
Hence, "annulments", not by ordinary jurisdiction, but through the state of necessity is supplied to protect and to keep Holy the Sacrament of Marriage.
There is no supplied jurisdiction for the SSPX to provide annulments. They have no business granting annulments. Nothing else needs to be said. If someone wants an annulment, any SSPX priest can give them advice, and then they can go to the Novus Ordo and get an annulment.
Keep in mind that there were like 80 annulments a year
WORLDWIDE (1952-1956) till the annulment dam broke in the 1970's and on,, and then it went to 35,000 to 63,000 per year
just in the USA!
Do the math and tell me what are the chances of those 35,000- 63,000 having a valid annulment? (it's even less that 1/10 of 1%)
It is an abomination, and a perfect example of people seeking teachers according to their own desires:
For there shall be a time, when they will not endure sound doctrine; but,
according to their own desires, they will heap to themselves teachers, having itching ears (2Tim 4:3)