If you have any specific questions or ideas related to exobiology, astrobiology, or the potential for extraterrestrial life, please feel free to ask, and I’ll do my best to provide information or engage in the discussion.
As of my last knowledge update in January 2022, there has been no scientific discovery or research related to the existence of cabbage or cabbage-like organisms on other planets or celestial bodies.1
References
1Patel AK, Joshi D, Khan A, et al. Biology, Diversity, Distribution, and Characterization of Brevicoryne brassicae (L.) Cabbage. International Journal of Plant & Soil Science. 36(3):336-347. doi:10.9734/ijpss/2024/v36i34431