Jesus said that the church would not be defeated, therefore, there are churches that are not defeated. This is also evident from the church types presented in Ch's 2 & 3 of the Book of Revelation.
Philadelphia & Sardis are there....just keep looking.
One can spend a lifetime looking for what is essentially, oneself.
Truly not defeated, but does that mean they have to have a member still living on the earth? I think they're all waiting in heaven now.