I casually put some vegetable/fruit seeds on some cups but I wasn’t able to keep track which was which. Are these eggplants?
We can say pretty definitely that it is not eggplant aubergine. Look up eggplant images and you will find first that the eggplant leaf is kinda dull where these are shiny, eggplant leaf is distinctly lobed (bumpy edges) even when juvenile, and the petioles really stand erect where your leaf shoots are quite horizontal.
Since you presumably used seed from a fruit, it can't possibly be annual stuff like basil or carrot or cabbage, so that leaves common stuff like orange, apple, pomegranate, kiwi and so on. What kind of stuff runs through your kitchen on a regular basis?