The archive of our own tag system is a solid starting point, but honestly the real specificity you're after might come from using the pairing filter combined with the 'First Kiss' or 'Kissing' additional tags. I spent a couple hours last weekend digging because I wanted that specific moment of tension, not just general Dramione. Try searching 'Draco Malfoy/Hermione Granger' on AO3, then in the filters under 'Additional Tags,' start typing 'kiss'—you'll see suggestions like 'First Kiss,' 'Kissing,' 'Accidental Kiss,' even 'Kissing as a Distraction' which is a fun trope.
Don't just stop at the top kudos results, though. Sometimes those are the epic war reconciliation fics where the kiss happens after 80k words of build-up. If you want the kiss to be more central, sort by the 'Kissing' tag itself. There's a particular one-shot called 'The Accidental Interrogation Method' that's basically 5k of them trapped and having to kiss to maintain a cover, and it's all from Draco's flustered POV. The tag system is your best friend here; it’s less about the platform and more about mastering how to use the filters to drill down to that very specific emotional beat you're craving.
Also, a lot of writers on Tumblr will post snippets or moodboards with the 'dramione kiss' tag, and sometimes those link out to full fics on AO3 or Google Docs. It’s a more visual, scrappier way to find that content, and you often get the raw, immediately-posted excitement of the author about that particular scene, which can be more satisfying than wading through a massive fic summary.