I thought Kana survived. But, no she was severely hit. Her got her Ahego face in Canon timeline, that in real not mental creation. That like golden canary flew too near to sun.
Kana
knew something bad would happen and went through with it anyway. Brave little bird.
We were aware that a significant effect happened because of those "outside voices" seeping into Kana's dream.
Now, the real question remains unanswered:
What happens to Kanaria after this? I still don't think she becomes delusional like e.g. Miku.
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In regards to this scene we should keep one thing in mind:
Kanaria's mental realm clearly had an accelerated flow of time as she went through numerous days (likely several weeks) in it. That's why we don't know whether the scene in this chapter happens while Kana is still "enjoying her dream" or if takes place after she broke it and went back.
If this starts around the time Delu-Sou made the sausage joke, then Kana could literally regain her consciousness any time now and I wouldn't count her out her yet.