paxchristi on Nostr: Help me understand this one, genuinely: The universal Church is "invisible", consists ...

Help me understand this one, genuinely:

The universal Church is "invisible", consists of the whole number of the elect ... "gathered into one". So it's invisible, but the elect (being physical persons) are gathered "into one", where?

Let's just assume, East/West apostolic Churches are Protestant Churches for this exercise, and that some of the people in them are "the elect", and then some of the other persons in all the remaining Protestant churches are also among the elect, where are they/would they be "gathered into one"?

If they all hold some variations on their understanding of Christ and salvation, most of the core ideas being mutually exclusive, where's the unity?

Thanks.