My automations are tagged in system manager AWS, but I can't find them

If you want to find the tag key/value, you can use the ListTagsForResources that lists tags for a specified resource like this:

{
    "ResourceType": "Automation",
    "ResourceId": "EXAMPLE_ID"
}

You can to retrieve the execution with the tag key using DescribeAutomationExecutions like this:

{
    "Filters":
        [
            {
                "Key": "TagKey",
                "Values": [ "EXAMPLE_KEY" ]
            }
        ]
}