Is there a list for tropes like substitute/replacement Seme/uke takes uke as substitute/r...

Do you have any genre that you would prefer or any type?

If there's any type you prefer, please let me know; I should be able to recommend.

Thanks, by any chance would you know a BL Substitute manhwa or manhua (can't remember if its Chinese, but I have a feeling) where the substitute is the son of a rich family with an older brother? Except they think he is dead as he had been abducted as a child. It's difficult to recall, but I think the white lotus is an ass, and so are the ML's friends as they belittle and demean him. There is a pool party where he gets bullied, and his biological family is invited, but they don't recognize him. Rather they pity him for being the substitute, something everyone knows about. I do fear that I read some of the chapters from the novel as it wasn't fully developed. I have tried everywhere, and gone to various ML regret, or substitute lists to no avail. At this point,t this is my last hope since you give great recs. I would appreciate it if you remember the title, or point me the right direction to certain lists I may have missed. Thanks.

Also, the substitute has no idea he was kidnapped as he was just a baby and may have gone through mistreatment that led him to cling to the rich dude (presumably the ml).