This blessing is not for people seeking a legitimation of same sex union but for those seeking to live better: “there is no intention to legitimize anything, but rather to open one’s life to God, to ask for his help to live better, and also to invoke the Holy Spirit so that the values of the Gospel may be lived with greater faithfulness” (FS 40).
https://www.crookston.org/bishop/statements/3588-nfpdecree-3