When selecting a policy for a user group, click the option before the policy to view its detailed content. Take the system policy "IAM ReadOnlyAccess" as an example.
{
"Version": "1.1",
"Statement": [
{ "Action": [
"iam:*:get*",
"iam:*:list*",
"iam:*:check*" ],
"Effect": "Allow"
}
]
}