Iam role created but it is not showing in the drop down menu of Modify IAM role[REQUIRED BY CODE DEPLOY]

Afraid there is no pictures attached.. Usually if a role doesnt appear, its because of the trust policy doesnt support the resource you are trying to assign the role too.

Update the role trust policy for the resource i.e. ec2 :-

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Principal": {
                "Service": "ec2.amazonaws.com"
            },
            "Action": "sts:AssumeRole"
        }
    ]
}

From iam dashboard I created a role for code deploy the trust policy is attached in the picture . When I am trying to modify iam role for the ec2 instance the created role is not available there