Fanfiction.net might also have some. But it has a more strict content policy compared to AO3. So, the 'lemon' fics might be a bit harder to find there. You can still try searching for 'tfp' and then look through the results carefully. Some authors might use more subtle tags or descriptions for the 'lemon' content, so you have to read the summaries closely to figure out if it's what you're looking for.
There are also some smaller, more niche fanfiction communities dedicated to 'tfp'. These might have 'lemon' fanfiction as well. You can find them through forums or social media groups related to 'tfp'. But be aware that the quality and the amount of content can vary greatly in these smaller communities. And as always, make sure to abide by the rules of these communities when looking for such fics.
Chapter 687, "How Did She Die Again?", is the clearest early answer because it turns Protagonist Group's situation into a concrete plot event. The chapter turns that into something concrete by moving from In the process of pursuing the Protagonist Group, she gradually came... to I'm busy here;
Chapter 853, "The Bracelet Worn by the Empress?!", is the clearest early answer because it turns Empress Zhaode's situation into a concrete plot event. It opens with Jiang Li carefully examined the branches and leaves for a while. and closes on After all, it's just an object;
Chapter 714, "I'm Using Voice Input", is the clearest early answer because it turns Using Voice Input's situation into a concrete plot event.
Chapter 666, "It Really is His Mom!", is the clearest early answer because it turns Xi Yang's situation into a concrete plot event. The chapter turns that into something concrete by moving from The crowd was shocked as they turned their attention to the unknown,...
Chapter 710, "Handsome, Who Are You?", is the clearest early answer because it turns Jiang Yu's situation into a concrete plot event. Early on, The man was wearing the white cotton attire of a beauty salon, the.... By the end, Wuu wuu wuu, she had actually bullied Jiang Li before, bullied her....
A practical answer is Chapter 291, because it turns the idea into a concrete scene. The chapter opens with Tell me more about the strength of that sect of yours, what makes you..., adds pressure through The Disgust in the giants' hearts towards the intelligent creatures..., and ends on he really.
Chapter 660, "Includes Meals and Accommodation?", is the clearest early answer because it turns Accommodation's situation into a concrete plot event.
Chapter 870, "She is My Ex-Girlfriend", is the clearest early answer because it turns Xue Wandeng's situation into a concrete plot event.
Chapter 899, "It's actually a seal script?!", is the clearest early answer because it turns Rong Kexi's situation into a concrete plot event. Early on, Jiang Cheng, with his head dizzy, was pulled into the courtyard by....
Chapter 838, "Just Call Me Grandpa", is the clearest early answer because it turns Zhao Lang'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.