The TVTropes Trope Finder is where you can come to ask questions like "Do we have this one?" and "What's the trope about...?" Trying to rediscover a long lost show or other medium but need a little help? Head to Media Finder and try your luck there. Want to propose a new trope? You should be over at You Know, That Thing Where.
Law of Conservation of Detail- nothing is actually irrelevant if it's being shown.
Currently Working On: Incorruptible Pure Pureness
^ Is Chekhov's Gun limited to objects used as foreshadowing? If so, it's too specific. I'm also referring to things such as throwaway phases that turn out to mean something later.
Unless it's a prequel with a Foregone Conclusion, that's the whole point of foreshadowing: something seems trivial or unimportant when we first see it, and later on we see the significance.
Ultimate Secret Wars
^ prequel + foreshadowing = Future Shadowing
We can never truly eradicate the coronavirus, but we can suppress its threat like influenza
A detail that is seemingly completely irrelevant turns out to be an important piece of foreshadowing.