Well most tunes contain snatches of scales* and little note sequences that could be regarded as arpeggios, or at least scraps of them. It's virtually unavoidable. I'm saying that individual notes within the context of the tune can suggest harmony. That's your personal reaction, not necessarily a deliberate ploy of the composer. Great art always leaves a lot up to you. You don't have to wait for the end of a note sequence before you have a lightbulb moment. And that's as philosophical as I'm likely to get today.

*Which is a good argument for not bothering to practise scales. As that mighty guru on TheSession often said, tunes ARE scales, so just play tunes.