Good question! And I relate, because I know that the Holy Spirit is with our Protestant brothers and sisters, too.
People might turn this thread into a big battle over whether there is any salvation outside the Church or not. I don’t want to get into all of that.
I would say, read this verse in the light of all of Scripture and with the Catechism.
Remember the thief on the cross? He didn’t eat the Eucharist but he was saved. There is a baptism of desire. The Holy Spirit works in mysterious ways, bringing us to a deeper knowledge of the truth.
Our separated brothers and sisters are ignorant of the Church’s teachings about the Eucharist, but they believe in the teachings about the Trinity and Jesus as their Savior. They are joined (however imperfectly) to the Church through their baptisms.
They are following Jesus the best they can. We entrust them to God’s mercy. He can judge their hearts and their desire for Him better than we can.