It is simple and highly recognizable
It is the first letter of the alphabet, making it a natural focal choice
People often default to A when forced to choose a letter without coordination
As dcor, large single letters often represent initials another natural focal cue
So yes, the letter "A" itself is a classic example of a Schelling point in choice tasks, because many people independently pick it as the default.
If you meant something else like:
Is this item from the brand Shelling Point?
Can you make a shelling-point logo?
Is this a good Christmas gift?
just let me know!

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