Unfortunately she does not have any plot armor. In the novel *spoiler alert*
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Even after she dies, many readers (me included) do not wish for her to come back to life. This is because death is kinder to her than her endless suffering when she was alive.
The novel still continues after that happens. Varkas turns back time and morphs his soul into her beloved wolf. We can see her again in this 2nd timeline, majority from Varkas's POV but she has already lost their child and depressed as hell. Surprisingly, not much going to change except for Varkas guarding her in close proximity as her wolf.
Someone else said how author is tormenting her even after her death is too much and I 1000% agree. Even in 2nd timeline, she is still miserable.

My stomach keeps dropping every chapter…I hate it. Why can’t my baby Thalia have her happy ending like bro where is her PLOT ARMOR