raws spoilers:
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Yes they died. The white cat died in the black cat arms and then her killed himself.
where did they hint Mino is pragnent?
Yes it was shown
they died together, but there was no body found. So idk if the author is hinting that they miraculously survived that or what.
In the final episode chapter, Agent kinda looked at Mino then said to swing by the hospital to have himself checked at. He did not say why. Then, when theyre alone, Yiho told Mino that he smells kinda different. It's still his pheromones but there's something mixed in it. Which is usually the case when Omegas are pregnant
There was a hint that Mino is pregnant in the final episode.
The next episode shows Gyor and Psyka died but not really sure since no bodies and news were found after that. Maybe in the side stories