Cool cartoon! :) My son adores it. Beautiful colors, beautiful music, cute cars.
Regarding pineapple and eggplant. I noticed that almost all Slavic names and surnames are indicated in the credits. The creators are either Russians, Ukrainians, or Belarusians, according to the forms of the names.
As a Ukrainian, 27, female, I have no idea what these emojis mean in the US :) I had to google it to find out. We do not use this style of communication widely. We prefer to speak directly about one thing or another. In general, our cultures are somewhat different and many things can surprise Americans about Slavs. Accordingly, Slavs are surprised by many things about Americans:)
Therefore, there is no basis for conjectures about pineapples and eggplants:)