I know, sarcastic, and acerbic just in case.
But for goodness sakes, how hard can it be? I think my first mobile Bibles were 15 years ago, and they uniformly are able to match verses (link).
I'm on latest ios13 and latest Logos app. Two Bibles linked (top-NETS; bottom LES). And they just can't seem to find the same verse. Image after top is paged forward (bottom ignores):

Now, if I move the bottom to catch up, the top moves backward (oh thanks). And if I move the top backwards, the bottom always follows (works). Here's another forward page-turn:

And to show linked:

By the by, in the single-linking, an OT-only will show a blank page, when an NT-only leads, rather than just ignore no-match and maintain its view.