CDKTF Using Iterators on Complex Types error

gistfile1.txt

[2023-01-03T08:54:34.404] [ERROR] default - ╷
│ Error: Invalid for_each set argument
│ 
│   on cdk.tf.json line 36, in module.s3-bucket:
│   36:       "for_each": "${toset(local.my-list)}",
│     ├────────────────
│     │ local.my-list is tuple with 2 elements
│ 
│ The given "for_each" argument value is unsuitable: "for_each" supports maps
basic-ec2-stack  ╷
                 │ Error: Invalid for_each set argument
                 │ 
                 │   on cdk.tf.json line 36, in module.s3-bucket:
                 │   36:       "for_each": "${toset(local.my-list)}",
                 │     ├────────────────
                 │     │ local.my-list is tuple with 2 elements
                 │ 
                 │ The given "for_each" argument value is unsuitable: "for_each" supports maps
                 │ and sets of strings, but you have provided a set containing type object.
                 ╵