Yes, there might be. Fanfiction is a vast world where all kinds of crossovers are possible. However, the quality and popularity can vary greatly. You can start your search on major fanfiction platforms like Archive of Our Own or FanFiction.net.
There's a good chance that such a fanfiction exists. Fan creators love to experiment with crossovers, and Percy Jackson and Black Adam are both rich in lore and character. The Percy Jackson series has a huge fan base, and with the growing popularity of Black Adam, it's a pairing that could attract fanfic writers. You may want to use specific search terms related to both characters when looking for it, such as their full names, character traits, or key events from their stories to narrow down the search results.
If you want the clearest chapter reference, go to Chapter 88. Early on, She wanted to refuse, but didn't have the courage to do so.; later, the chapter leans on The Chen'an Entertainment she worked for was currently the largest....
The best chapter pointer here is Chapter 55, "I Can Prove Everything Miss Jiang Said Is True!". It opens with Su Yinwan hadn't expected that, in just one day, Jiang Li's reputation had... and closes on He Yun's fans were immediately displeased..
A practical answer is Chapter 62, because it turns the idea into a concrete scene. The chapter opens with Sitting on the edge of her bed, she pondered for a while before lifting..., adds pressure through And it had been seven days since his last dose., and ends on Jiang Li reached in, pulled out a.
Chapter 95 is the strongest chapter-level answer because it starts from Hearing others praise her daughter, Aunt Lin was smiling so wide she... and follows through on Your boyfriend must have studied in another province, if I'm not mistaken,....
Chapter 62 is the strongest chapter-level answer because it starts from Sitting on the edge of her bed, she pondered for a while before lifting... and follows through on Jiang Li reached in, pulled out a piece of paper, and slightly raised her....
The best chapter pointer here is Chapter 66, "This Sister Really Can Hustle!". It opens with I can't take it anymore, why did the young master even find a pair of... and closes on Unable to find a staff member to notify, and not wanting to waste time for....
Look to Chapter 100 for the clearest answer. It begins with The barrage was about to die of laughter., keeps building through [Hahahaha, help, why is the young master always being chased!] [Next door,..., and lands on Her eyes flickered slightly as she grabbed the hand..
Look to Chapter 71 for the clearest answer. It begins with Shu Yan curled her lips with a hint of jealousy, "When can it be my turn..., keeps building through Who in this circle didn't know that Jiang Li had a thing for the..., and lands on Now they had to work on an empty stomach..
Look to Chapter 85 for the clearest answer. It begins with Facing everyone's skepticism and curiosity, Jiang Li explained fluently:..., keeps building through The tomatoes are grown by them, and the eggs are also from their..., and lands on This fresh and vibrant flavor blended perfectly..
Look to Chapter 80 for the clearest answer. It begins with Jiang Yan and Wen Jiaojiao, one so smug he was almost ascending to the..., keeps building through And this was exactly the scene Director Sun wanted to see., and lands on arrogant princess with Princess Disease, I'm totally for it, fam.].