there are details which truly immerse one within a fictional setting. Which those are will vary from reader to reader and from author to author. However, the end result always be the same. The world feels real. I recently came across a culinary informational bite that already slotted directly into a scene I had in mind. How common are fried sweetbreads be theu donuts or elephant ears or funnel cake or or cinnamon rolls? I was recently informed that around the world cultures usually have their own variation of this common dietary staple. Encouraged that we come up with one for our own fictional setting.

Furthermore, I recommend reading this journal for another world-building tidbit.
https://www.furaffinity.net/journal/9487499/