We also have Lutherans in USA, but I don’t see the Church going out of its way to bother very much about them.
There were about three Lutheran churches in the neighborhood of where I lived when I was growing up. At this point, two have shut down and the third one is being shared with an Anglican church. Meanwhile, the four Catholic churches in town are still going, though we might lose one of them due to an aging and dwindling base in that part of town. The other three have fairly large attendances.
I know in Germany, Lutherans are more of a force to be reckoned with, but with the numbers of these Protestant churches shrinking over time, it seems like eventually they may just disappear.