I'd caution against looking for deliberate symbolism in these ancient tales. The Grimm brothers wrote these in the early 19th century, but the folk tales they drew from are far older. But the mirror seems to be a representation of vanity. The Queen is gazing in the mirror because she's obsessed with her beauty, which is why she's jealous of the younger Snow White.
Perhaps the fable needs a modern update:
“GPTmazon-Portal on the wall, who is the fairest of them all?”
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