What tests were conducted?
What are the symptoms when she eats these things?
Now, a few suggestions for substitutes:
Beef - aside from chicken, turkey, fish, pork, and the like one can also eat rabbit, lamb, goat, deer, buffalo, and ostrich
beet, artichoke - optional, don’t really have a substitute.
broccoli, cauliflower - how about cabbage? Brussel sprouts, asparagus?
carrot - parsnips
spinach - there are a LOT of greens. Try kale (but may be a problem for beet allergic), or bok choy for mild/sweet greens. There are also turnip greens, radish greens, collard greens, mustard greens… I grow a lot of greens in my garden and mix them together or often use them interchangeably.
cherry - optional, substitute other fruits.
milk - unnecessary for adult humans, but there is rice and almond milk out there. (Also soy milk, but apparently that’s a problem, too…?)
oat, rye, wheat - is she allergic or is she gluten intolerant? It’s a little unusual to be allergic to that triad but they are all a problem for the gluten intolerant or celiac crowd. Celiac-specific breads and the like are available, made with grains that don’t trigger than reaction. Whether allergic or intolerant such gluten-free foods might work out.
onion - just onion, or onion+garlic+leeks? It’s a little unusual to be allergic to just onions and not the whole triad.
orange - either substitute with other citrus (lemon, lime, etc.) or just avoid
safflower - got nothing here
soybean - avoid. Which is difficult to do in North America
pumpkin - substitute with other squash.
shrimp - don’t eat it. Is it just shrimp, or all shellfish?
white potato - white potato as opposed to…what? Sweet potato? Other varieties of potato? Important to know this. If it’s the whole potato crowd (including such things as blue potatoes) then sweet potatoes might be OK because sweet potatoes actually aren’t true potatoes. If it’s just white potatoes then some of the other varieties of true potatoes might be OK if you can find them, but cross reactions might be a problem.
Look like gluten-free bread might work, but you’ll have to read the labels.
However, as I mentioned above, there’s some slightly odd stuff going on here - no broccoli and no cauliflower, but what about the rest of that vegetable family? Again, what were these tests? Some tests are inclined to give false positives, meaning they’ll say you’re allergic when you might not actually be, so there need to be follow ups. Also, anyone with that many allergies or intolerances (and it’s possible to have both at the same time) should probably speak to a professional nutritionist about dietary changes.