From syracuse.com:
Catholics who continue to formally follow the Society of Saint Pius X face excommunication, the bishop of the Catholic Diocese of Syracuse warned in a letter.
The warning follows the Vatican’s declaration that the Society of Saint Pius X, known as SSPX, entered a formal schism after consecrating four bishops without Pope Leo XIV’s approval during a July 1 ceremony in Switzerland. That means the Vatican regards SSPX clergy and followers as having separated themselves from the Church. Syracuse Bishop Douglas J. Lucia said in the letter that SSPX priests are now considered excommunicated. He also warned that Catholics who formally adhere to the society after learning of the Vatican’s decree face excommunication under church law.