Ummm, I hate to break the news to you, but the Vatican and various Catholic bishops have quite vocally spoken out against the Hagia Sophia being converted into a Mosque on numerous occasions. The US Conference of Catholic Bishops also designated July 24 as a Day of Mourning for Hagia Sophia.
Protestant church "leaders", on the other hand.... ::crickets::
Oh, really. This is the only thing I've heard Francis say, "My thoughts go to Istanbul. I think of Santa Sophia and I am very pained."
But many other things pain the Francis, as well, like border walls, capitalism, the lack of wealth redistribution, global warming, Catholics breeding like rabbits, etc.