Though we have seen the denomination that claims to have never changed has indeed changed.
That would be the Orthodox. The Catholic church has always claimed to be able to change things that are not defined dogma, and in particular to adapt prudential matters of governance -- how the faith is taught, not which faith is taught -- to different cultures, times, and places.
Like THIS???
"One indeed is the universal Church of the faithful, outside which no one at all is saved, in which the priest himself is the sacrifice, Jesus Christ, whose body and blood are truly contained in the sacrament of the altar under the species of bread and wine; the bread (changed) into His body by the divine power of transubstantiation, and the wine into the blood, so that to accomplish the mystery of unity we ourselves receive from His (nature) what He Himself received from ours."
--Pope Innocent III and Lateran Council IV (A.D. 1215)
I've NOT seen any FR Catholics; who claim Day One as their own; own up to the claimed FACT that the 7 churches in Revelation are CATHOLIC!