When you read questions regarding how person A feels for person B, is your experience that important but not direct circumstances will affect the cards?

like say person A in this case is on a vacation away from B for some days or cannot reach B the day the reading was done etc.

Or do you find that the tarot focuses on the bigger direct feelings, and not minute things that can affect feelings in the moment?

It depends on how you ask.
"How does A feel about B?" will often get you something different from "How does A feel about B today?"

What katrinka said. If you're worried about timing, include it in your question. A might generally love B, but today A is annoyed with B. If you only ask how A feels about B and you get the answer annoyed, unless you've put a timeframe around the question, you won't know if A is generally annoyed or just annoyed right now. A well-formed question is essential to a reading.

This makes sense. I’ve sometimes seen really brief feelings come up in the cards when asking this question. Maybe it’s because if you aren’t specific and the cards “think” they need to tell you something, then that will show up.