Might not fit 100% but Search has a military aspect as well as a mysterious/supernatural aspect to it so I think if you've watched all the other similar shows you could try this one.

While this one seems more lighthearted in a way, Come and Hug me has the same FL lead and its crime heavy. While there is not time travel involved, I think the style and telling of these dramas are similar. Come and Hug Me is a more angsty slow burn however, I think they are pretty similar so if you haven't you could always give this one a try!

I realize Survival Code isn't even out yet (*cries*) but based off of the description alone they have the following similarities:

- groups that get trapped on a deserted island
- survival
-romance

I think Survival code will be a bit more serious than Missing 9 (Missing 9 is fantastic in the beginning, but I feel like they put way too much comedy into the latter half of the show, so it kinda defeats the fear / tension of the show sometimes).

I'll update this once Survival Code starts airing !

While Bulgasal: Immortal Souls only has 2 episodes out at the moment, the feeling I get from watching this is similar to when I watched Arthdal Chronicles. I believe this was mainly due to the setting, and the fantasy aspect to it.

In Bulgasal, there is a curse and there are these monsters. However in Arthdal, it's a different species / race and the settings both border on this fantasy aspect. Plus the action scenes to me are similar.

I know that's not a lot in common, but who knows! With the progression of the show the similarities could become greater.