Oh Chinese stories are all censored because they could go to jail, so it's gonna be hard to find actually yaoi
Also some time-traveling bl, this one is new & omegaverse:
https://www.mangago.me/read-manga/turning/
Well i got this list, maybe you'll like something from there? It's reincarnation/transmigration/time travel in one
https://www.mangago.me/home/mangalist/2248962/
As the title said! Im looking for korean comics with time travel or sci fi, also please link Chinese yaois, I only see BL nowadays, curious