Can anyone recommend me k-dramas with reincarnation themes? Something like Hotel Del Luna and Bulgasal where the present and past are mixed together and both shown? I also watched Goblin, Born Again and From Now On, Showtime! (currently watching).

It can also be a c-drama, but not xianxia/wuxia (if those exist?). I have nothing against them and I know this specific theme is well represented, but I would like something more "realistic" ?

Chicago Typewriter it's one of my favorites I am sure you will love it :)

 Klio:
k-dramas with reincarnation themes

Definitely:

Technically has reincarnation themes, but the reincarnation aspect is a fairly small part of the story (either it happens at the very end, its minor enough that you could probably get rid of it without changing much about the story, or both):

 Klio:
It can also be a c-drama, but not xianxia/wuxia (if those exist?)