Two men on the bench outside the chemist, one holding the other's coffee while he ties his shoe. Nobody would file that under romance, but it is.
The word usually gets reserved for candlelight and anniversaries, which means most of it goes uncounted. Tenderness happens constantly in public, badly lit, in supermarket aisles and bus queues.
Finding it is a habit of attention more than a matter of luck. Once you start seeing it in strangers, you tend to see it at home too, in the mug someone left out for you, the shoes moved out of the doorway.
Look for one instance today that isn't yours.