You can also try Fanfiction.net. While it may not be as focused on this particular pairing as AO3, there are still likely to be some 'richie x eddie lemon' fanfics there. Browse through the relevant categories or use the search bar. Another option is to check out Tumblr. There are often fanfic writers who post their works directly on their Tumblr blogs, and you can find them by searching for the relevant tags or by following fandom - related blogs.
Some Reddit communities dedicated to the fandom might also be a good source. For example, subreddits related to the original work that Richie and Eddie are from. People often share and discuss fanfics in those communities. Additionally, some Wattpad users may write 'richie x eddie lemon' fanfics, so it's worth taking a look there as well, although the quality can vary.
Chapter 613, "When a Whale Falls, All Life Thrives", is the clearest early answer because it turns Shaobai's situation into a concrete plot event. The chapter turns that into something concrete by moving from Hearing He Wen's words, Shen Lan was so excited she nearly sprayed...
Chapter 439, "Never Question Sister Li", is the clearest early answer because it turns Sister Li's situation into a concrete plot event. It opens with There was no helping it, she brought the man here, so even if he was...
Chapter 905, "I Plan to Quit the Circle", is the clearest early answer because it turns Is's situation into a concrete plot event.
Chapter 773, "I am the Trainee Here", is the clearest early answer because it turns Shiguang's situation into a concrete plot event.
Chapter 616, "I'm Going to Save Sister Xiao Wan!", is the clearest early answer because it turns Su Yinwan's situation into a concrete plot event. Early on, Since the storm had hit that morning, he had been preoccupied and out....
Chapter 537, "Ding, Jiang Cheng's affinity drops by 10 points!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. Early on, Miss Su Yinwan immediately hung her head in dejection.. By the end, In this regard, he still held a slight advantage..
Chapter 440, "You Know Fengshui Array?!", is the clearest early answer because it turns Ji Yanbai's situation into a concrete plot event. The chapter gives readers a real answer by opening on The scorching afternoon sun, wrapped with moist sea breeze, ascended...
Chapter 838, "Just Call Me Grandpa", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from Gu Qiang's expression was subtle as well.
Chapter 566, "New Game Begins!", is the clearest early answer because it turns Ai Xiaochun's situation into a concrete plot event. Early on, How is that possible?" Luo Xuan frowned, "What's the rush?. By the end, I have a bad feeling about this.] [Wake up, when King Zheng speaks,....
Chapter 879, "Is it My Turn to Settle Accounts?", is the clearest early answer because it turns Su Yinwan's situation into a concrete plot event. Early on, Jiang Li gave her a meaningful look.. By the end, At this moment, her expression completely turned cold..