This may help you find a suitable vet (in case you haven’t seen that thread yet). https://binkybunny.com/FORUM/tabid/54/aft/116849/afnp/278073/Default.aspx
You might be able to guess their breed or breed mix once they are adults. The body form and weight might help narrow it down. I was never able to guess the breed of my first rabbit. My best guess was she was a dutch/lop mix. But when she was young and I was not familiar with rabbit breeds, google images led me to believing she might be a rex, or english spot, and one person even suggested American Flemish. Lol. She turn out to weigh 5lbs as an adult. Be wary of image searches because you get a lot of results that are clearly mis-labeled.
Another thing that can be confusing with rabbit breeds is some breed names are also
colour names. But the colours can appear in multiple different rabbit breeds. Some examples of that are Himalayan, Harlequin, Silver Marten, Tan.. I think Palomino also.
Your black and white bunny would be called Magpie Harlequin pattern/colour and the fawn one is possible Palomino (does it have a white belly and underside of tail). BUT that does not mean they are also that breed of rabbit.
Hope I’ve made sense. Doubtful. Lol.