A couple of people have pointed me to https://familysearch.org/obituaries/. This is a useful little page for searching for obituaries on FamilySearch.org, but I wonder if it suffers from limitations of which you should be aware.
The page searches the Memories feature of FamilySearch Family Tree, perhaps for stories containing the word “obituary.” It doesn’t seem to search the obituaries being indexed by FamilySearch Indexing. One example collection is “United States, Obituaries, American Historical Society of Germans from Russia, 1899-2012.”
Both have their place. Perhaps FamilySearch will one day have a search system that searches both.