In the desired output, the sublist is part of the second item, so you need to build it so:
#enum(
numbering: "1.a)",
enum.item[aa],
enum.item([bb] + enum(
numbering: "1.a)",
enum.item[xx],
enum.item[yy]
)),
)
In the desired output, the sublist is part of the second item, so you need to build it so:
#enum(
numbering: "1.a)",
enum.item[aa],
enum.item([bb] + enum(
numbering: "1.a)",
enum.item[xx],
enum.item[yy]
)),
)