Good morning!! Damn, that's a hard question TT JiLix is so precious to me but they are a rare pair, kind of, and their tags is full of "omegas who kiss" and "sister who kiss for their boyfriends" (which can be cool sometimes but if you truly ship them it kind of sucks to have only that).

There are a lot of cools ones under the JiLix fest collection in ao3 that I'm gonna link bellow, from which I specially love Derezzed by Shadow (that could be my all time favorite) and The Keeper's gift by Ghost.
https://archiveofourown.org/collections/JiLixPromptFest

You and I (live or die) by star-skiz is a yummy mafia one-shot
https://archiveofourown.org/works/64100674

Knock, Knock by Ghost has Chan on it (so it's ChanSungLix) but JiLix sre the stablished couple and it's a nice, hot thing to read
https://archiveofourown.org/works/57055300

I'm sorry I can't reccomend more, but I have limited JiLix in my library... if anyone else wants to send their reccs, I'll be glad too ❤️