How is your bunny doing now? Has she been pooping, eating and drinking after the vomit appeared? How does she look – normal and responsive, takes a treat, moves about etc or is she lethargic, very still or is she looking uncomfortable and unable to find a body position that’s comfy?
Rabbits don’t vomit. They can sometimes have liquid or smeary poop. That’s not good because it can make them dehydrated very fast. It does tend to be brownish in color though and have a pungent smell, so I don’t think it could be confused with vomit by anyone, esp not a mother who must’ve seen lots of vomit in her day (since babies vomit a lot).
Food mixes of pellets and dried fruit are not recommended. Rabbits are clever creatures and learn to pick out the yummy fruit-pieces and ignore the rest. Long term this is detrimental for their health. Dried fruit has a too high sugar to fiber ratio. You don’t want your bun to eat a lot of sugar. Plain pellets are better because the bun can’t eat them selectively. Dried fruits can be used in small amounts as treats.
Observe your bun, try giving her a treat (a bun that won’t take a treat is not healthy) and report back!