I’d say the chance that the remaining Ivies turn into something is pretty small. Not zero, but small. If the coaches thought it was likely I think they’d have done the pre-read; it’s part of what they’d do to be ready for next steps.
I’d typically suggest expanding the pool but it seems you have a preferred non-recruiting school in mind, and you’ve narrowed the recruiting focus to schools that, if offered, you’d consider instead?
If so, I think you just need to see how the visits pan out. Who knows, maybe you love the schools you visit, one of the other Ivies does need to fill out the recruiting class, or you go the non-recruiting route and it works out. So, don’t worry. Just be realistic.
Good luck!