How do I pass the elements of a tuple as the arguments to a macro called with compound?

<assign|my-tuple|<tuple|1|2|3>>

<tree|my-tuple|<value|my-tuple>>

except I want the tree to look like

my-tree
 / | \
1 2 3

and not:

   my-tree
      |
<tuple|1|2|3>

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