You can try fanfic websites like Archive of Our Own (AO3). It has a large collection of Harry Potter fanfics, and you can use the search function to look for ones specifically about Harry kissing Lavender. Just type in relevant keywords like 'Harry' 'Lavender' 'kiss' and browse through the results.
Fanfiction.net is also a good place to search. There are many Harry Potter fanfics there. You may need to do a bit more digging as the site is huge, but if you search for the characters' names along with the action of kissing, you might find some interesting stories about Harry and Lavender.
Some smaller Harry Potter - focused fanfic communities or forums might also have such fanfics. For example, certain Reddit groups dedicated to Harry Potter fanfiction could be a source. Members might share or recommend their favorite 'Harry kisses Lavender' fanfics in those communities.
Chapter 279, "The Sudden Blaze", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event.
Chapter 370, "Jiang Li, Thank You for Coming to Save Me", is the clearest early answer because it turns Coming's situation into a concrete plot event. Early on, He Yun's trial took place a week later, as scheduled..
Chapter 373, "Mr. Jin is the Best, How Could He Possibly Lose?!", is the clearest early answer because it turns Best's situation into a concrete plot event. It opens with As night fell, the lobby of the Golden Sand lit up with layers of...
Chapter 629, "The Family is Going to be Gone", is the clearest early answer because it turns Bai Lu's situation into a concrete plot event. It opens with Even after training under Jiang Li for so long, they couldn't... and closes on You aren't the one injured!" He had had enough of this island!.
Chapter 256, "Bonfire Feast", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. It opens with Turning around, Jiang Yan and Zhao Lang found their heads had been... and closes on I was dazzled seeing Jiang Li trending today." Next door, Su Yinwan....
Chapter 343, "He Can Support Jiang Li for a Lifetime", is the clearest early answer because it turns Lifetime Jiang Li's situation into a concrete plot event. It opens with But she suddenly acted mischievously indifferent, "Are you a...
Chapter 343, "He Can Support Jiang Li for a Lifetime", is the clearest early answer because it turns Are's situation into a concrete plot event. The chapter gives readers a real answer by opening on But she suddenly acted mischievously indifferent, "Are you a...
Chapter 475, "Doting on the Man You Love to the Fullest", is the clearest early answer because it turns Shang Shuyue's situation into a concrete plot event. Early on, On the other side, Jiang Yan and Shang Shuyue also set off..
Chapter 554, "I've calculated it, he won't die", is the clearest early answer because it turns Bai Lu's situation into a concrete plot event. The chapter gives readers a real answer by opening on Just ahead, there should be a substantial source of water," Jiang Li...
Chapter 558, "The Love-Struck, Flirty Wife Appears", is the clearest early answer because it turns Ai Xiaochun's situation into a concrete plot event. The chapter turns that into something concrete by moving from These people's comments are just too unpleasant; where does the fish...